A wet low temperature drying apparatus

Abstract

The utility model discloses a kind of wet low-temperature drying equipment, including drying tank and flow guide mechanism;Drying tank: the rear side of the outer surface of drying tank is fixedly connected with support, and the mounting hole of the rear side of the upper surface of support is equipped with cyclone separator;Flow guide mechanism: it includes airflow channel, ladder face, air outlet and guide cover, the through-hole of the front side upper end of the wall of drying tank is equipped with airflow channel, airflow channel is right side opening's non-closed annular structure, the front side of airflow channel protruding portion is gas inlet end, the lower surface of airflow channel left and right sides is ladder face, the vertical surface of ladder face is equipped with air outlet, air outlet is fixedly connected with guide cover, this wet low-temperature drying equipment, by the setting of flow guide mechanism, the drying airflow that enters drying tank is guided, forces drying airflow to spread to drying tank center, and cross collision with atomized after mist drop group, improve the drying efficiency of material.

Description

Technical Field

[0001] This utility model relates to the field of material drying technology, specifically a wet low-temperature drying device. Background Technology

[0002] When drying heat-sensitive materials, wet low-temperature drying technology is usually used. Wet low-temperature drying is a technology in which the material is first treated with wet process and then dried in a low-temperature environment (usually ≤60℃). The core is low temperature and humidity control to avoid damage to the material components. It is widely used in food, medicine, chemical and other fields. Wet low-temperature drying equipment is required when performing wet low-temperature drying.

[0003] Existing wet low-temperature drying equipment typically atomizes liquid materials into tiny droplets through an atomizer and sprays them into the drying tank. At the same time, a drying medium (air or inert gas) preheated to a set low temperature enters the drying tank and comes into full contact with the droplets, instantly evaporating the moisture. The dried powder then enters a cyclone separator with the airflow to separate the powder from the exhaust gas.

[0004] The following problems exist: the drying gas enters the drying tank through the side wall opening, and the drying gas tends to flow rapidly along the inner wall of the drying tank, forming wall flow. This results in insufficient contact between the droplets and the gas in the central area, leading to low drying efficiency of the material. To address this, we propose a wet low-temperature drying device. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a wet low-temperature drying device. By setting up a flow guiding mechanism, the drying airflow entering the drying tank is guided, forcing the drying airflow to diffuse towards the center of the drying tank and cross-collide with the atomized droplet group, thereby improving the drying efficiency of the material and effectively solving the problems in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wet low-temperature drying device, comprising a drying tank and a flow guiding mechanism;

[0007] Drying tank: A bracket is fixedly connected to the rear side of the outer surface of the drying tank, and a cyclone separator is installed in the installation port on the rear side of the upper surface of the bracket.

[0008] The flow guiding mechanism includes an airflow channel, stepped surfaces, air outlets, and guide covers. An airflow channel is provided in the through hole at the upper front end of the wall of the drying tank. The airflow channel has a non-closed ring structure with an opening on the right side. The protruding part on the front side of the airflow channel is the air inlet. The lower surface of the airflow channel has stepped surfaces on both the left and right sides. Air outlets are opened on the vertical surfaces of the stepped surfaces. Guide covers are fixedly connected to the air outlets. The guide covers have an inclined triangular structure on the rear side of the upper surface. Through the setting of the flow guiding mechanism, the drying airflow entering the drying tank is guided, forcing the drying airflow to diffuse towards the center of the drying tank and cross-collide with the atomized droplet group, thereby improving the drying efficiency of the material.

[0009] Furthermore, the flow guiding mechanism also includes partition plates. Partition plates are provided on both the left and right sides inside the guide cover. The two partition plates located in the same guide cover together divide the guide cover into three identical areas, which facilitates the airflow to be divided into multiple airflow bundles.

[0010] Furthermore, the flow guiding mechanism also includes a flow divider plate. A flow divider plate is provided between the upper and lower walls of the airflow channel. The flow divider plate is located on the front side of the interior of the airflow channel. The flow divider plate divides the interior of the airflow channel into two identical spaces that are symmetrical on the left and right, so as to divide the airflow entering the airflow channel into two parts.

[0011] Furthermore, the flow guiding mechanism also includes flow guiding plates. The upper side of the inner wall of the drying tank is provided with evenly distributed flow guiding plates. The flow guiding plates are all inclined and are evenly distributed around the tank axis of the drying tank on the inner wall of the drying tank, which facilitates the diversion of the airflow into multiple branches and forces the airflow to diffuse towards the center of the cavity.

[0012] Furthermore, an atomizer is installed in the mounting groove on the upper surface of the drying tank. The lower end of the atomizer is the atomization outlet, which is located inside the drying tank. A feed pipe is installed at the liquid inlet of the atomizer through a flange and bolts. The input end of the atomizer is electrically connected to the output end of an external controller to facilitate the atomization and spraying of liquid materials.

[0013] Furthermore, the discharge port on the lower surface of the drying tank is connected to the inlet of the cyclone separator via a conveying pipe, and a collection box is provided below the discharge port at the lower end of the cyclone separator to facilitate the separation of exhaust gas from powdery materials.

[0014] Furthermore, the air inlet end of the airflow channel is also equipped with an air inlet pipe via a flange and bolts. A temperature sensor is installed in the mounting hole on the upper surface of the air inlet end of the airflow channel. The detection end of the temperature sensor penetrates the top wall of the airflow channel and is located inside the airflow channel. The output end of the temperature sensor is electrically connected to the input end of an external controller to facilitate monitoring of the temperature of the dry airflow.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This wet low-temperature drying equipment has the following advantages:

[0016] The low-temperature drying air introduced into the drying tank forms a ring-shaped rotating air curtain under the combined action of the airflow channel and the guide hood. This air curtain envelops the droplets generated after the liquid material in the central area is atomized. The droplets are initially homogenized by the partition plate. Then, due to the presence of the guide plate, the drying airflow is forced to diffuse towards the center of the drying tank, where it crosses and collides with the atomized droplet group. This prevents the droplets from concentrating in a single airflow channel, thus improving the drying efficiency of the liquid material. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the present invention from a right-side cross-sectional view.

[0020] Figure 4 This is a schematic diagram of the flow guiding mechanism of this utility model;

[0021] Figure 5 This is a cross-sectional structural schematic diagram of the flow guiding mechanism of this utility model.

[0022] In the diagram: 1. Drying tank, 2. Cyclone separator, 3. Flow guiding mechanism, 31. Airflow channel, 32. Stepped surface, 33. Air outlet, 34. Guide cover, 35. Divider plate, 36. Diverter plate, 37. Flow guide plate, 4. Temperature sensor, 5. Atomizer, 6. Feed pipe, 7. Conveying pipe, 8. Collection box, 9. Air inlet pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This embodiment provides a technical solution: a wet low-temperature drying device, including a drying tank 1 and a flow guiding mechanism 3;

[0025] Drying tank 1: A bracket is fixedly connected to the rear side of the outer surface of the drying tank 1. A cyclone separator 2 is installed in the installation port on the rear side of the upper surface of the bracket. The discharge port on the lower surface of the drying tank 1 is connected to the inlet of the cyclone separator 2 through a conveying pipe 7. A collection box 8 is provided below the discharge port at the lower end of the cyclone separator 2. The airflow carrying the dried powder enters from the tangential inlet on the side of the cyclone separator 2 and moves in a high-speed spiral motion along the inner wall of the cyclone separator 2, forming a strong rotating airflow. During the rotation, the powder particles are subjected to huge centrifugal force (usually tens to hundreds of times the gravity) because their density is much greater than that of the gas. They are thrown towards the inner wall of the cyclone separator 2 and separated from the airflow. The particles thrown to the inner wall slide down the wall of the cyclone separator 2 under the action of gravity to the collection box 8 at the bottom and are collected. The gas forms an upward spiral airflow along the central axis and is discharged from the exhaust port at the top.

[0026] The airflow guiding mechanism 3 includes an airflow channel 31, a stepped surface 32, an air outlet 33, and a guide cover 34. An airflow channel 31 is located within a through-hole at the upper front side of the wall of the drying tank 1. The airflow channel 31 has a non-closed annular structure with an opening on the right side. The protruding part on the front side of the airflow channel 31 is the air inlet. The lower surface of the airflow channel 31 has stepped surfaces 32 on both the left and right sides. Air outlets 33 are located on the vertical surfaces of the stepped surfaces 32. Guide covers 34 are fixedly connected to each air outlet 33. Each guide cover 34 has a triangular structure with an inclined rear side on its upper surface. Afterwards, the air... Under the guidance and constraint of the airflow channel 31 and the stepped surface 32, the airflow flows out of the airflow channel 31 from the air outlet 33 at different positions on the airflow channel 31. Because the airflow channel 31 has a non-closed ring structure with an opening on the right side, a rotational guiding force is applied to the airflow flowing out of the air outlet 33. Because the rear side of the upper surface of the guide cover 34 has an inclined triangular structure, the guide cover 34 guides the airflow flowing out of the air outlet 33 downward at an angle. Under the combined action of the guide cover 34 and the airflow channel 31, the airflow forms an annular rotating air curtain, which wraps the mist droplets in the central area.

[0027] The flow guiding mechanism 3 also includes a partition plate 35. The left and right sides of the inside of the guide cover 34 are provided with partition plates 35. The two partition plates 35 located in the same guide cover 34 together divide the guide cover 34 into three identical areas. Due to the presence of the partition plate 35, when the airflow passes through the partition plate 35 in the guide cover 34, it will be divided into multiple airflow bundles to achieve the initial homogenization of the gas. When it comes into contact with the mist droplets later, it can avoid the problem of local airflow being too strong or too weak.

[0028] The flow guiding mechanism 3 also includes a flow divider 36. A flow divider 36 is provided between the upper and lower walls of the airflow channel 31. The flow divider 36 is located on the front side of the interior of the airflow channel 31. The flow divider 36 divides the interior of the airflow channel 31 into two identical spaces that are symmetrical to the left and right. The dry air introduced into the airflow channel 31 is first divided into two streams and flows to the left and right sides of the airflow channel 31 under the action of the flow divider 36.

[0029] The flow guiding mechanism 3 also includes a flow guiding plate 37. The upper side of the inner wall of the drying tank 1 is provided with a uniformly distributed flow guiding plate 37. The flow guiding plates 37 are all inclined and are evenly distributed around the tank axis of the drying tank 1. Due to the presence of the flow guiding plate 37, the airflow flowing along the wall of the drying tank 1 is divided into multiple branches under the action of the flow guiding plate 37. The inclined flow guiding plate 37 and the uniformly distributed around the tank axis of the drying tank 1 force the airflow to diffuse towards the center of the drying tank 1 and cross and collide with the atomized droplet group, so that the droplets will not concentrate in a single airflow channel, thereby improving the drying efficiency of liquid materials.

[0030] An atomizer 5 is installed in the mounting groove on the upper surface of the drying tank 1. The lower end of the atomizer 5 is the atomization outlet, which is located inside the drying tank 1. The inlet of the atomizer 5 is connected to the feed pipe 6 by a flange and bolts. The input end of the atomizer 5 is electrically connected to the output end of an external controller. The atomizer 5 can be a centrifugal atomizer. The liquid material is conveyed to the high-speed rotating atomizing disc. Under the action of centrifugal force of the atomizing disc, the liquid is thrown out along the groove or nozzle on the edge of the disc. The thrown liquid collides with the surrounding air and breaks into tiny droplets, forming an umbrella-shaped mist. The liquid material (such as biological agents) is introduced into the atomizer 5 through the feed pipe 6. Under the action of the atomizer 5, the liquid material is atomized into tiny droplets and sprayed into the drying tank 1.

[0031] The air inlet end of the airflow channel 31 is also equipped with an air inlet pipe 9 via a flange and bolts. A temperature sensor 4 is installed in the mounting hole on the upper surface of the air inlet end of the airflow channel 31. The detection end of the temperature sensor 4 penetrates the top wall of the airflow channel 31 and is located inside the airflow channel 31. The output end of the temperature sensor 4 is electrically connected to the input end of an external controller. At the same time, low-temperature dry air is introduced into the airflow channel 31 through the air inlet pipe 9, and the temperature sensor 4 monitors whether the temperature of the introduced dry air meets the requirements.

[0032] The working principle of the wet low-temperature drying equipment provided by this utility model is as follows: Liquid material (such as biological agents) is fed into the atomizer 5 through the feed pipe 6. Under the action of the atomizer 5, the liquid material is atomized into tiny droplets and sprayed into the drying tank 1. At the same time, low-temperature drying air is introduced into the airflow channel 31 through the air inlet pipe 9. The temperature of the introduced drying air is monitored by the temperature sensor 4 to ensure that the temperature meets the requirements. The drying air introduced into the airflow channel 31 is first divided into two streams by the flow divider 36 and flows to the left and right sides of the airflow channel 31. Then, under the guidance and restriction of the airflow channel 31 and the stepped surface 32, the airflow flows out of the airflow channel 31 from the air outlets 33 at different positions on the airflow channel 31. Because the airflow channel 31 has a non-closed ring structure with an opening on the right side, a rotational guiding force is applied to the airflow flowing out of the air outlet 33. Because the rear side of the upper surface of the guide cover 34 has an inclined triangular structure, the guide cover 34 guides the airflow flowing out of the air outlet 33 downward at an incline. Under the combined action of the airflow, an annular rotating air curtain is formed, enveloping the droplets in the central area. Due to the presence of the partition plate 35, the airflow is divided into multiple airflow streams when passing through the partition plate 35 inside the guide hood 34, achieving initial homogenization of the gas. When it subsequently comes into contact with the droplets, it can avoid the problem of excessively strong or weak local airflow. Due to the presence of the guide plate 37, the airflow flowing along the wall of the drying tank 1 is split into multiple branches under the action of the guide plate 37. The inclined guide plate 37, which is evenly distributed around the tank axis of the drying tank 1, forces the airflow to... The airflow diffuses towards the center of the drying tank 1, colliding with the atomized droplets. This prevents the droplets from concentrating in a single airflow channel, improving the drying efficiency of the liquid material. When the drying air comes into contact with the droplets, the droplets evaporate moisture and become powdery material. The dried powder, along with the airflow, enters the cyclone separator 2 through the conveying pipe 7. Under the action of the cyclone separator 2, the powdery material is discharged from the outlet below the cyclone separator 2 and flows into the collection box 8. The airflow exits the cyclone separator 2 through the exhaust port above the cyclone separator 2.

[0033] It is worth noting that the external controller disclosed in the above embodiments can be an STM32 series, the temperature sensor 4 can be a TMP100NA / 3K, and the atomizer 5 can be a JGF series centrifugal atomizer. The external controller controls the operation of the temperature sensor 4 and the atomizer 5 using methods commonly used in the prior art.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A wet low-temperature drying device, characterized in that: It includes a drying tank (1) and a flow guiding mechanism (3); Drying tank (1): A bracket is fixedly connected to the rear side of the outer surface of the drying tank (1), and a cyclone separator (2) is provided in the installation port opened on the rear side of the upper surface of the bracket; The flow guiding mechanism (3) includes an airflow channel (31), a stepped surface (32), an air outlet (33), and a guide cover (34). The airflow channel (31) is provided in the through hole at the upper front side of the wall of the drying tank (1). The airflow channel (31) has a non-closed ring structure with an opening on the right side. The protruding part of the front side of the airflow channel (31) is the air inlet. The lower surface of the airflow channel (31) has stepped surfaces (32) on both the left and right sides. The vertical surfaces of the stepped surfaces (32) are provided with air outlets (33). The air outlets (33) are fixedly connected to the air outlets (33). The guide covers (34) are all triangular structures with an inclined rear side on the upper surface.

2. The wet low-temperature drying equipment according to claim 1, characterized in that: The flow guiding mechanism (3) also includes a partition plate (35). The left and right sides of the inside of the guide cover (34) are provided with partition plates (35). The two partition plates (35) located in the same guide cover (34) together divide the guide cover (34) into three identical areas.

3. The wet low-temperature drying equipment according to claim 1, characterized in that: The flow guiding mechanism (3) also includes a flow divider (36). A flow divider (36) is provided between the upper and lower walls of the airflow channel (31). The flow divider (36) is located on the front side of the interior of the airflow channel (31). The flow divider (36) divides the interior of the airflow channel (31) into two identical spaces that are symmetrical on the left and right.

4. The wet low-temperature drying equipment according to claim 1, characterized in that: The flow guiding mechanism (3) also includes a flow guiding plate (37). The upper side of the inner wall of the drying tank (1) is provided with a uniformly distributed flow guiding plate (37). The flow guiding plates (37) are all inclined and are evenly distributed around the tank axis of the drying tank (1) on the inner wall of the drying tank (1).

5. The wet low-temperature drying equipment according to claim 1, characterized in that: An atomizer (5) is provided in the mounting groove on the upper surface of the drying tank (1). The lower end of the atomizer (5) is the atomization outlet located inside the drying tank (1). A feed pipe (6) is installed at the liquid inlet of the atomizer (5) through a flange and bolts. The input end of the atomizer (5) is electrically connected to the output end of an external controller.

6. The wet low-temperature drying equipment according to claim 1, characterized in that: The discharge port on the lower surface of the drying tank (1) is connected to the inlet of the cyclone separator (2) through a conveying pipe (7), and a collection box (8) is provided below the discharge port at the lower end of the cyclone separator (2).

7. The wet low-temperature drying equipment according to claim 1, characterized in that: The air inlet end of the airflow channel (31) is also equipped with an air inlet pipe (9) by means of a flange and bolts. A temperature sensor (4) is provided in the mounting hole opened on the upper surface of the air inlet end of the airflow channel (31). The detection end of the temperature sensor (4) penetrates the top wall of the airflow channel (31) and is located inside the airflow channel (31). The output end of the temperature sensor (4) is electrically connected to the input end of an external controller.

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