A high-efficiency low-temperature refrigeration water-removal device

Abstract

The utility model discloses a kind of high-efficiency low-temperature refrigeration water removal devices, it is related to low-temperature refrigeration water removal technical field, including, by atomizer and primary freezer liquid material is changed into inside loose porous small particle size solid particles, can increase the contact area with secondary freezer in low-temperature negative pressure environment, shorten the migration path of moisture in the particle interior, improve water removal efficiency and effect, subsequent into water removal spiral disc, the spiral structure of water removal spiral disc provides long path, low flow rate's motion track for solid particles, ensure that particle has enough time and the low-temperature negative pressure environment in secondary freezer contact, under the vibration of vibrator, frozen solid particles roll on water removal spiral disc and move, maximum limit increase with low-temperature negative pressure environment contact, so that particle surface is constantly renewed, reduce water vapor in the adhesion of particle surface, improve mass transfer effect.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature freezing and dehydration technology, specifically to a high-efficiency low-temperature freezing and dehydration device. Background Technology

[0002] In the production chain of the conventional food, health, and pharmaceutical industries, product stability and long-term storage capacity are among the core factors determining its market value and safety. To achieve this, obtaining powdered products is a crucial step, and this process relies heavily on efficient and reliable dehydration devices. Whether it's various powdered raw materials used in the food and health industry to extend product shelf life and retain nutrients, or pharmaceutical ingredients with stringent standards for purity and stability in the pharmaceutical industry, the technological level of the dehydration process directly impacts the quality of the final product. Among them, peptides, representing a special class of products, have more stringent requirements for yield, efficacy retention, and shelf life during the production process due to the sensitivity of their molecular structure and the specificity of their application scenarios. In the existing technology system, for such high-requirement products, low-temperature freezing and dehydration methods are often used. The core principle of this technology is to first pre-cool the product, converting the water in the product into solid ice, and then, under negative pressure, use the principle of sublimation to directly convert the ice into water vapor and remove it. The entire process is carried out in a low-temperature environment, which can minimize the loss of the product's active ingredients.

[0003] However, most current cryogenic freezing dehydration devices require the liquid product to be dehydrated to be stored in a container, such as a vial or tray, before being placed in the device for freezing. The device heats the frozen product under negative pressure, and the sublimated water vapor is captured by a water trap. Throughout the dehydration process, the frozen product remains static, with a small heating area and limited heat transfer. Furthermore, because heat transfer is gradual, from the surface to the interior, the mass transfer effect deteriorates as the surface moisture of the frozen product is removed. This not only further prolongs the dehydration time, reducing the equipment's production efficiency, but also results in a low product yield and significant waste of raw materials. Utility Model Content

[0004] The purpose of this utility model is to provide a high-efficiency low-temperature freezing dehydration device to solve the technical problems of existing low-temperature freezing dehydration devices, where the product is always static, the heating area is small, the mass transfer effect is poor, the dehydration time is long, the equipment has low production efficiency, and the product yield is also low.

[0005] This utility model proposes a high-efficiency low-temperature freezing dehydration device, including a dehydration component, a temperature control component, and a pressure differential component. The dehydration component is used to perform low-temperature freezing dehydration on materials, the temperature control component is used to control the internal temperature of the dehydration component, and the pressure differential component is used to control the internal pressure differential of the dehydration component. The water removal assembly includes a primary freezer, a secondary freezer, a water removal spiral disc, and an atomizer. The primary freezer is located at the front end of the secondary freezer. The input end of the primary freezer is equipped with an atomizer for atomizing liquid materials into droplets. The primary freezer is used to freeze the droplets into solid particles. The input end of the secondary freezer is connected to the output end of the primary freezer, and is used to remove water from solid particles at low temperature. The secondary freezer is equipped with a dewatering spiral disk that provides a spiral motion path for the solid particles.

[0006] Preferably, the highest end of the dewatering spiral disc is the output end, the lowest end of the dewatering spiral disc is the input end, the output end of the dewatering spiral disc is connected to the input end, and the output end of the dewatering spiral disc is also provided with a discharge port.

[0007] Preferably, the input end of the dewatering spiral disc is connected to the output end of the first-stage freezer.

[0008] Preferably, the dewatering assembly further includes a vibrator disposed on the dewatering spiral disc, the vibrator being used to drive the solid particles in the dewatering spiral disc to roll from the input end of the dewatering spiral disc to the output end of the dewatering spiral disc.

[0009] Preferably, the high-efficiency low-temperature refrigeration dehydration device also includes a water-capturing component; The water trapping assembly includes a first trap and a second trap. The first trap is used to trap water vapor in the secondary freezer, and the second trap is used to trap water vapor in the primary freezer.

[0010] Preferably, the temperature control component includes a first temperature controller and a second temperature controller; The first temperature controller works in conjunction with the primary freezer and the second trap through a temperature control pipeline to control the internal temperature of the primary freezer and the second trap. The second temperature controller works in conjunction with the secondary freezer and the first trap through a temperature control pipeline to control the internal temperature of the secondary freezer and the first trap. Furthermore, the internal temperature of the secondary freezer is higher than that of the primary freezer.

[0011] Preferably, the high-efficiency low-temperature refrigeration dehydration device also includes a separation component; The separation assembly includes a gas-feed separator; The gas separator is connected to the secondary freezer and the first collector respectively, and is used to collect the water vapor carrying particulate material in the secondary freezer and input the separated water vapor into the first collector.

[0012] Preferably, the output end of the gas-material separator is provided with a first collector, which is used to temporarily store the particulate material separated by the gas-material separator. The output end of the first collector is provided with a second collector, which is used to collect and discharge the particulate material in the first collector or to transfer the particulate material to the secondary freezer.

[0013] Preferably, a buffer chamber may be selectively provided between the secondary freezer and the gas-material separator.

[0014] Preferably, the differential pressure assembly includes a differential pressure controller that controls the internal pressure of the primary chiller, the secondary chiller, the first collector, the second collector, and the second collector via pipelines.

[0015] Compared with the prior art, this utility model has at least the following beneficial effects: In this invention, liquid materials are transformed into small-diameter solid particles with loose and porous internal structure through an atomizer and a primary freezer. This increases the contact area with the low-temperature negative pressure environment inside the secondary freezer, shortens the migration path of moisture inside the particles, and improves the dewatering efficiency and effect. Subsequently, after entering the dewatering spiral disk, the spiral structure of the dewatering spiral disk provides a long path and low flow velocity trajectory for the solid particles, ensuring that the particles have sufficient time to contact the low-temperature negative pressure environment inside the secondary freezer. Under the vibration of the vibrator, the frozen solid particles roll on the dewatering spiral disk, maximizing the contact with the low-temperature negative pressure environment, causing the particle surface to be constantly renewed, reducing the adhesion of water vapor on the particle surface, and improving the mass transfer effect. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is one of the structural schematic diagrams of the low-temperature freezing and dehydration device of this utility model; Figure 2 This is the second schematic diagram of the low-temperature freezing dehydration device of this utility model; Figure 3 This is a schematic diagram of the water removal spiral disc structure in this practical application; Figure 4 This is a schematic diagram of the existing technology structure.

[0018] In the diagram: 1. First temperature controller; 2. Second temperature controller; 3. Primary freezer; 4. Secondary freezer; 5. Dewatering spiral disc; 6. Vibrator; 7. Atomizer; 8. First collector; 9. Second collector; 10. Air-material separator; 11. First collector; 12. Second collector; 13. Buffer chamber; 14. Differential pressure controller; 15. Dewatering cabinet; 16. Container; 17. Temperature control panel; 18. Water collection mechanism; 19. Negative pressure system. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0020] like Figure 4 As shown, the working process of the existing low-temperature freezing dehydration device is roughly as follows: First, the liquid product to be dehydrated is stored in the storage container 16. Then, the storage container 16 is placed on the temperature control plate 17 in the dehydration cabinet 15 for freezing. The negative pressure system 19 adjusts the internal pressure of the dehydration cabinet 15, so that the dehydration cabinet 15 heats up in a negative pressure environment to heat the frozen product. The sublimated water vapor is captured by the water-catching mechanism 18, thereby completing the dehydration operation.

[0021] like Figure 1-3 As shown in the figure, this embodiment provides a high-efficiency low-temperature freezing dehydration device, which includes a dehydration component, a temperature control component, and a differential pressure component.

[0022] Specifically, the dehydration unit is used to dehydrate materials by low-temperature freezing.

[0023] Specifically, the temperature control component is used to control the internal temperature of the dehydration component.

[0024] Specifically, the differential pressure component is used to control the internal differential pressure of the water removal component.

[0025] The water removal components include a primary freezer 3, a secondary freezer 4, a water removal spiral disc 5, and an atomizer 7.

[0026] Furthermore, the primary freezer 3 is located at the front end of the secondary freezer 4, and the input end of the primary freezer 3 is equipped with an atomizer 7 for atomizing liquid materials into droplets. The primary freezer 3 is used to freeze the droplets into solid particles.

[0027] Specifically, the liquid material enters the primary freezer 3 through the atomizer 7. The atomizer 7 atomizes the liquid material, forming frozen solid particles. The atomizer 7 atomizes the liquid material into small-diameter droplets, increasing the contact area between the droplets and the low-temperature environment inside the primary freezer 3, achieving instantaneous freezing, reducing structural damage to the material during the freezing process. Furthermore, the frozen solid particles have an extremely high specific surface area, 100-200 times that of traditional block-shaped frozen materials of the same mass, allowing for a larger contact area with the low-temperature negative pressure environment inside the secondary freezer 4, thus increasing efficiency. The process is more efficient, and because the liquid material contains solid particles, the water in the droplets freezes rapidly during the atomization and freezing process. The water molecules do not have time to arrange themselves in an orderly manner, forming a large number of tiny ice crystals. This results in a loose and porous ice crystal structure inside the solid particles. As a result, during the subsequent sublimation process, these pores become fast channels for water vapor, shortening the migration path of water inside the particles. This avoids the obstruction of water vapor by the dense ice crystals formed by traditional slow freezing, further accelerating the speed at which water leaves the particles and improving the dehydration efficiency and effect.

[0028] Furthermore, the atomized frozen solid particles are approximately spherical in shape, exhibiting excellent fluidity during subsequent transfer, preventing pipe blockage. Moreover, after entering the dewatering spiral disk 5, the spherical solid particles can roll smoothly, and the particles are not prone to sticking or accumulating.

[0029] Furthermore, the input end of the secondary freezer 4 is connected to the output end of the primary freezer 3 for low-temperature dehydration of solid particles.

[0030] Furthermore, the dewatering spiral disc 5 is installed inside the secondary freezer 4 to provide a spiral motion path for the solid particles. The highest end of the dewatering spiral disc 5 is the output end, and the lowest end of the dewatering spiral disc 5 is the input end. The output end of the dewatering spiral disc 5 is connected to the input end. The output end of the dewatering spiral disc 5 is also provided with a discharge port. The input end of the dewatering spiral disc 5 is connected to the output end of the primary freezer 3.

[0031] Specifically, solid particles fall from the primary freezer 3 onto the dehydration spiral disk 5 in the secondary freezer 4. Under the vibration of the vibrator 11, the frozen solid particles roll from the lower end to the upper end of the dehydration spiral disk 5. During the movement, sublimation occurs to remove water and form granular material. The spiral structure of the dehydration spiral disk 5 provides a long path and low flow velocity for the solid particles, ensuring that the particles have enough time to contact the low temperature negative pressure environment in the secondary freezer 4, so that the water can fully sublimate. Moreover, the movement trajectory of the solid particles is from bottom to top. Under the action of the solid particles' own gravity, they will be evenly spread on the dehydration spiral disk 5, and it is not easy for them to accumulate. This not only ensures that the solid particles can move smoothly, but also that the flatly spread solid particles can contact the low temperature negative pressure environment evenly, ensuring the stability and uniformity of sublimation.

[0032] Furthermore, driven by the vibrator 11, the solid particles spread on the dewatering spiral disk 5 will also turn and roll during the spiral upward movement, maximizing the contact with the low temperature negative pressure environment, so that the particle surface is constantly renewed, reducing the adhesion of water vapor on the particle surface and improving the mass transfer effect.

[0033] It should be noted that the moisture content detector inside the secondary freezer 4 detects the particulate material. If the moisture content is within acceptable limits, the material is discharged directly from the upper end of the dewatering spiral disc 5. If the moisture content is not within acceptable limits, the particulate material at the upper end of the dewatering spiral disc 5 re-enters the lower end of the dewatering spiral disc 5 for secondary dewatering.

[0034] In this embodiment, the dewatering assembly also includes a vibrator 6 disposed on the dewatering spiral disk 5. The vibrator 6 is used to drive the solid particles in the dewatering spiral disk 5 to roll from the input end of the dewatering spiral disk 5 to the output end of the dewatering spiral disk 5.

[0035] In this embodiment, the low-temperature freezing dehydration device also includes a water-catching component.

[0036] Specifically, the water trapping assembly includes a first trap 8 and a second trap 9. The first trap 8 is used to trap water vapor in the secondary freezer 4, and the second trap 9 is used to trap water vapor in the primary freezer 3.

[0037] Furthermore, the second collector 9 captures the small amount of water vapor generated during the sublimation of the liquid material inside the primary freezer 3 during atomization. The second collector 9 captures the small amount of water vapor in the primary freezer 3 in real time, preventing water vapor from accumulating in the primary freezer 3 and causing particle adhesion. At the same time, it reduces the total amount of water vapor entering the secondary freezer 4, thereby reducing the water removal load of the secondary freezer 4. In this embodiment, the temperature control component includes a first temperature controller 1 and a second temperature controller 2.

[0038] Furthermore, the first temperature controller 1 works in conjunction with the first-stage freezer 3 and the second trap 9 through a temperature control pipeline to control the internal temperature of the first-stage freezer 3 and the second trap 9.

[0039] Furthermore, the second temperature controller 2 works in conjunction with the secondary freezer 4 and the first trap 8 through a temperature control pipeline to control the internal temperature of the secondary freezer 4 and the first trap 8, and the internal temperature of the secondary freezer 4 is higher than the internal temperature of the primary freezer 3.

[0040] Specifically, the first temperature controller 1 and the second temperature controller 2 are started to pre-cool the primary freezer 3, the secondary freezer 4, the first collector 8, and the second collector 9. The first temperature controller 1 controls the temperature of the primary freezer 3 and the second collector 9, and the second temperature controller 2 controls the temperature of the secondary freezer 4 and the first collector 8. This ensures that the internal temperature of the secondary freezer 4 meets the requirements for low-temperature dehydration, and that the temperature of the secondary freezer 4 is higher than that of the primary freezer 3. The first temperature controller 1 and the second temperature controller 2 independently control the temperature difference between the primary freezer 3 and the secondary freezer 4. This ensures that the primary freezer 3 can quickly freeze the atomized droplets into solid particles, avoiding direct adhesion of droplets, while keeping the temperature of the secondary freezer 4 slightly higher to provide a suitable temperature driving force for the sublimation and dehydration of the solid particles, ensuring that the solid particles can sublimate stably. At this time, the temperature of the second collector 9 is lower than that of the first-stage freezer 3, and the temperature of the first collector 8 is lower than that of the second-stage freezer 4, ensuring that the water vapor generated by subsequent sublimation can be quickly condensed into ice in the water collector, and preventing water vapor from flowing back to the first-stage freezer 3 and the second-stage freezer 4 and affecting the water removal effect.

[0041] In this embodiment, the low-temperature freezing dehydration device further includes a separation component, which includes a gas-material separator 10.

[0042] Specifically, the gas separator 10 is connected to the secondary freezer 4 and the first collector 8 respectively. It is used to collect the water vapor carrying particulate material in the secondary freezer 4 and input the separated water vapor into the first collector 8. The output end of the gas separator 10 is provided with a first collector 11, which is used to temporarily store the particulate material separated by the gas separator 10. The output end of the first collector 11 is provided with a second collector 12, which is used to collect and discharge the particulate material in the first collector 11 or transfer the particulate material to the secondary freezer 4.

[0043] Furthermore, the water vapor carrying particulate material in the secondary freezer 4 enters the gas-material separator 10. The gas-material separator 10 centrifugally separates the water vapor carrying particulate material, realizing the recovery of particulate material. The first collector 8 captures the water vapor in the gas-material separator 10. The secondary freezer 4 is the main place for water removal. Its sublimation process is relatively violent and will generate a large amount of water vapor. At this time, the water vapor will be mixed with a lot of particulate material. The gas-material separator 10 centrifugally separates and recovers the fine particles in the water vapor, avoiding the particles from entering the first collector 8 with the water vapor and causing waste, further improving the product yield, and at the same time preventing the particles from clogging the condenser pipe of the first collector 8.

[0044] Furthermore, the control valve between the first collector 8 and the gas-material separator 10 is closed, allowing the particulate material in the gas-material separator 10 to fall into the first collector 11 for unified collection. The control valve is closed to maintain the pressure stability of the gas-material separator 10, allowing the material particles to smoothly enter the first collector 11 under their own gravity. When the particulate material collected in the first collector 11 reaches a certain amount, the differential pressure controller 14 controls the internal pressure of the second collector 12 to be lower than the internal pressure of the first collector 11 and higher than the internal pressure of the secondary freezer 4. The control valve between the first collector 11 and the second collector 12 is then opened, allowing the particulate material inside the first collector 11 to enter the second collector 12. The pressure difference between the first collector 11 and the second collector 12 drives the particle transfer, which can transfer a large amount of particulate material at once, ensuring that the gas-material separator 10 can work for a long time, reducing the downtime frequency and improving production efficiency.

[0045] Furthermore, the recovered particulate material is tested by the moisture content detector inside the No. 2 collector 12. If the moisture content is qualified, the material is discharged directly from the No. 2 collector 12. If the moisture content is unqualified, the control valve between the No. 2 collector 12 and the secondary freezer 4 is opened, and the recovered particulate material re-enters the secondary freezer 4 from the No. 2 collector 12 for dehydration. The particles recovered by the gas-material separator 10 are subjected to secondary testing and rework to ensure that all products meet the moisture content requirements, thereby maximizing the recycling of materials and reducing raw material loss.

[0046] In this embodiment, a buffer chamber 13 may be selectively provided between the secondary freezer 4 and the gas-material separator 10.

[0047] Furthermore, when the water-gas flow rate fluctuates significantly within the secondary chiller 4, the buffer chamber 13 can stabilize the water-gas flow rate entering the gas-material separator 10, preventing water-gas flow rate fluctuations from affecting the stable operation of the gas-material separator 10 and ensuring separation efficiency. In this embodiment, the differential pressure assembly includes a differential pressure controller 14, which controls the internal pressure of the primary freezer 3, the secondary freezer 4, the first collector 8, the second collector 9 and the second collector 12 through pipelines.

[0048] Specifically, the differential pressure controller 14 is activated to control the internal pressure of the primary freezer 3, the secondary freezer 4, the first trap 8, and the second trap 9. This ensures that the internal pressure of the primary freezer 3 and the secondary freezer 4 meets the pressure requirements for low-temperature water removal. The internal pressure of the primary freezer 3 is lower than that of the second trap 9, and the internal pressure of the secondary freezer 4 is lower than that of the first trap 8. Furthermore, the internal pressure of the secondary freezer 4 is not greater than that of the primary freezer 3. By controlling the pressure difference between the primary freezer 3 and the second trap 9, and between the secondary freezer 4 and the first trap 8, the differential pressure controller 14 provides the core driving force for the migration of water vapor inside the primary freezer 3 and the secondary freezer 4. This allows water vapor to flow from the low-pressure area to the high-pressure area, preventing the accumulation of water vapor generated by sublimation inside the primary freezer 3 and the secondary freezer 4, which forms a concentration barrier. This ensures that water vapor is efficiently and stably discharged from the primary freezer 3 and the secondary freezer 4. Furthermore, the pressure of the secondary freezer 4 is slightly lower than that of the primary freezer 3, ensuring that the solid particles in the primary freezer 3 can fall smoothly into the secondary freezer 4, thus guaranteeing the smoothness of the solid particle transfer process.

[0049] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A high-efficiency low-temperature freezing and dehydration device, characterized in that: Includes water removal components, temperature control components, and differential pressure components; The dehydration component is used to perform low-temperature freezing and dehydration on the material; the temperature control component is used to control the internal temperature of the dehydration component; and the differential pressure component is used to control the internal differential pressure of the dehydration component. The water removal assembly includes a primary freezer (3), a secondary freezer (4), a water removal spiral disc (5), and an atomizer (7). The primary freezer (3) is located at the front end of the secondary freezer (4). The input end of the primary freezer (3) is provided with an atomizer (7) for atomizing liquid materials into droplets. The primary freezer (3) is used to freeze droplets into solid particles. The input end of the secondary freezer (4) is connected to the output end of the primary freezer (3) for low-temperature dehydration of solid particles. The secondary freezer (4) is equipped with a dehydration spiral disk (5) that provides a spiral motion path for the solid particles.

2. The high-efficiency low-temperature freezing dehydration device according to claim 1, characterized in that, The highest end of the dewatering spiral disc (5) is the output end, and the lowest end of the dewatering spiral disc (5) is the input end. The output end of the dewatering spiral disc (5) is connected to the input end, and the output end of the dewatering spiral disc (5) is also provided with a discharge port.

3. The high-efficiency low-temperature freezing dehydration device according to claim 1, characterized in that, The input end of the dewatering spiral disc (5) is connected to the output end of the first-stage freezer (3).

4. The high-efficiency low-temperature freezing dehydration device according to claim 1, characterized in that, The dewatering assembly also includes a vibrator (6) disposed on the dewatering spiral disk (5), the vibrator (6) being used to drive the solid particles in the dewatering spiral disk (5) to roll from the input end of the dewatering spiral disk (5) to the output end of the dewatering spiral disk (5).

5. The high-efficiency low-temperature freezing dehydration device according to claim 1, characterized in that, It also includes water-capturing components; The water trapping assembly includes a first trap (8) and a second trap (9). The first trap (8) is used to trap water vapor in the secondary freezer (4), and the second trap (9) is used to trap water vapor in the primary freezer (3).

6. The high-efficiency low-temperature freezing dehydration device according to claim 5, characterized in that, The temperature control component includes a first temperature controller (1) and a second temperature controller (2); The first temperature controller (1) is connected to the first-stage freezer (3) and the second trap (9) through a temperature control pipeline to control the internal temperature of the first-stage freezer (3) and the second trap (9); The second temperature controller (2) works in conjunction with the secondary freezer (4) and the first trap (8) through a temperature control pipeline to control the internal temperature of the secondary freezer (4) and the first trap (8); Furthermore, the internal temperature of the secondary freezer (4) is higher than the internal temperature of the primary freezer (3).

7. The high-efficiency low-temperature freezing dehydration device according to claim 5, characterized in that, It also includes separate components; The separation component includes a gas-feed separator (10); The gas separator (10) is connected to the secondary freezer (4) and the first collector (8) respectively, and is used to collect the water vapor carrying particulate material in the secondary freezer (4) and input the separated water vapor into the first collector (8).

8. The high-efficiency low-temperature freezing dehydration device according to claim 7, characterized in that, The output end of the gas separator (10) is provided with a first collector (11), which is used to temporarily store the particulate material separated by the gas separator (10). The output end of the first collector (11) is provided with a second collector (12), which is used to collect and discharge the particulate material in the first collector (11) or transfer the particulate material to the secondary freezer (4).

9. The high-efficiency low-temperature freezing dehydration device according to claim 7, characterized in that, A buffer chamber (13) may be selectively provided between the secondary freezer (4) and the gas-material separator (10).

10. The high-efficiency low-temperature freezing dehydration device according to claim 8, characterized in that, The differential pressure assembly includes a differential pressure controller (14), which controls the internal pressure of the primary freezer (3), the secondary freezer (4), the first collector (8), the second collector (9) and the second collector (12) through pipelines.

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