Micron spray microwave combined drying equipment

Abstract

The utility model discloses a micron spray microwave combined drying equipment, including drying jar, still including setting in drying jar for the drying of material's micron spray drying subassembly and microwave drying subassembly, the micron spray drying subassembly includes setting in drying jar feed end one side's air blower, dehumidifier and gas heater, the microwave drying subassembly includes the magnetron for generating microwave and the microwave radiator for carrying out the radiation of microwave in the distribution arrangement of drying jar lateral wall, the utility model discloses the setting of micron spray drying subassembly and microwave drying subassembly, utilize the combination of nanometer spray drying technique and microwave drying technique, atomize liquid material into the liquid drop of micron level, then utilize hot drying gas fast evaporation solvent, continue using microwave drying direct action in the inside of mist drop after the preliminary removal of solvent to the evaporation of residual solvent thereby accelerates.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a micron-sized spray microwave combined drying device. Background Technology

[0002] Currently, the main drying equipment used in the market includes freeze drying, spray drying, steam drying, and infrared drying. Among them, freeze drying equipment is not only expensive, but also has a limited capacity for drying a small number of products per cycle and consumes a lot of energy; hot air drying requires a large area, has a high energy consumption for the internal blower, and takes a long time to dry; steam drying is unstable due to overheating and relies on internal diffusion control, so it is suitable for large, indivisible materials or materials with high dry matter content. During the drying process, care must be taken to avoid excessively high temperatures, otherwise the surface moisture will evaporate while the internal moisture remains; spray drying is suitable for liquid, slurry, and muddy materials, and can produce powdered products after drying. It is simple to operate and highly efficient, but its disadvantages include large equipment size, low heat energy utilization, and the ability to dry more material with higher inlet air temperatures. However, excessively high temperatures will affect the quality of the powder and severely damage the active substances in the material; infrared drying eliminates mold while drying and is environmentally friendly, but it causes significant damage to the color of the material and has complex operation, so its technology still needs further improvement.

[0003] The recently emerging nanospray drying can prepare nanoscale ultrafine particles, but the equipment is expensive and complex, has strict requirements on material properties, is not suitable for highly viscous materials, has low output, high energy consumption, causes electrostatic dust problems, and has high post-processing difficulty. Microwave drying is efficient and energy-saving, with uniform and controllable heating and compact equipment, but it is not suitable for drying low-concentration materials, has microwave leakage risks, and has high equipment costs.

[0004] Therefore, there is an urgent need for a micron-sized spray microwave combined drying equipment to solve the above problems. Utility Model Content

[0005] To achieve the above objectives, the present invention provides the following technical solution: a micron spray microwave combined drying device, including a drying tank, and further including a micron spray drying component and a microwave drying component disposed in the drying tank for drying materials; The micron spray drying assembly includes a blower, a dehumidifier, and a gas heater located on one side of the feed end of the drying tank. The blower, dehumidifier, and gas heater are connected to each other via ventilation pipes. An ultrasonic atomizer is provided inside the drying tank near the feed inlet. The microwave drying assembly includes magnetrons distributed on the side wall of the drying tank for generating microwaves and microwave radiators for radiating microwaves. The magnetrons are connected to the microwave radiators via waveguides. The side wall of the drying tank is also provided with a microwave suppressor, which is connected to the microwave radiators.

[0006] The drying tank is equipped with a conveying assembly for conveying materials. The conveying assembly includes a liquid storage tank located on the side of the drying tank near the inlet. The liquid storage tank is provided with a conveying pipe on the side near the drying tank. A liquid heater and a feeding peristaltic pump are sequentially provided on the side wall of the conveying pipe near the drying tank.

[0007] The feed end of the drying tank is equipped with a distributor, and the ultrasonic atomizer and the feeding peristaltic pump are respectively connected to the distributor.

[0008] The drying tank is equipped with a processing component for treating the internal dust. The processing component includes a bag filter located on one side of the drying tank. The bag filter is connected to the drying tank via a dust suction pipe. A gas outlet is provided on one side of the bag filter, and the gas outlet is connected to an external vacuum pump via a pipe.

[0009] The discharge end of the drying tank is connected to a collection box. The discharge port of the drying tank is provided with a discharge assembly to prevent the material from forming a cone-shaped pile in the collection box. The discharge assembly includes a cone-shaped guide tube fixedly connected to the discharge port. A fixed tube is fixedly connected to the side of the cone-shaped guide tube near the collection box. An inclined discharge tube is connected to the side of the fixed tube away from the cone-shaped guide tube through a connecting assembly. Multiple strip-shaped holes are opened on the side of the discharge tube away from the drying tank. The fixed tube is provided with a drive assembly for driving the discharge tube.

[0010] The connecting assembly includes an annular dovetail hole opened on the side of the fixed pipe near the discharge pipe, and an annular dovetail plate is rotatably connected to the annular dovetail hole. One end of the annular dovetail plate is connected to the discharge pipe.

[0011] The drive assembly includes a fixed plate fixedly connected to the side wall of the fixed pipe, a motor fixedly connected to the side of the fixed plate near the drying tank, a gear fixedly connected to the output end of the motor, and a gear ring fixedly connected to the side wall of the discharge pipe, the gear ring and the gear being meshed with each other.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This utility model discloses a micron-spray microwave combined drying equipment. By combining micron-spray drying components and microwave drying components, it utilizes a combination of nano-spray drying technology and microwave drying technology to atomize liquid materials into micron-sized droplets. Then, hot drying gas is used to rapidly evaporate the solvent, initially removing the solvent. Microwave drying continues to act directly on the interior of the droplets, thereby accelerating the evaporation of residual solvent. It is particularly suitable for drying heat-sensitive materials with high viscosity that cannot be solved by nano-spray drying. The dried material particles are uniform, have high content, and no obvious agglomeration. Compared with nano-spray drying or microwave drying alone, it has a wider range of material selection, reasonable equipment cost, simple operation, low energy consumption, high output, convenient post-processing, and high product quality. It can be applied to the drying of substances that are difficult to dry completely, such as protein powder and alkali metal alkoxides. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the position and structure of the discharge component of this utility model at the discharge port; Figure 3 This is a schematic diagram of the drive component structure of this utility model; Figure 4 This is a schematic diagram of the connecting component structure of this utility model.

[0014] In the diagram: 1. Drying tank; 201. Blower; 202. Dehumidifier; 203. Gas heater; 204. Ultrasonic atomizer; 301. Magnetron; 302. Microwave radiator; 303. Microwave suppressor; 401. Liquid storage tank; 402. Liquid heater; 403. Feeding peristaltic pump; 5. Distributor; 601. Bag filter; 602. Gas outlet; 603. Vacuum pump; 7. Collection box; 801. Conical guide tube; 802. Fixing tube; 803. Discharge tube; 804. Strip hole; 901. Annular dovetail hole; 902. Annular dovetail plate; 1001. Fixing plate; 1002. Motor; 1003. Gear; 1004. Gear ring. Detailed Implementation

[0015] 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.

[0016] Example 1 Please see Figures 1-4The figure shows a micron spray microwave combined drying device, which includes a drying tank 1, and a micron spray drying component and a microwave drying component disposed in the drying tank 1 for drying materials. The micron spray drying assembly includes a blower 201, a dehumidifier 202 and a gas heater 203 located on one side of the feed end of the drying tank 1. The blower 201, dehumidifier 202 and gas heater 203 are connected to each other via air pipes. An ultrasonic atomizer 204 is provided inside the drying tank 1 near the feed inlet. The microwave drying assembly includes a magnetron 301 distributed on the side wall of the drying tank 1 for generating microwaves and a microwave radiator 302 for radiating microwaves. The magnetron 301 is connected to the microwave radiator 302 through a waveguide. The side wall of the drying tank 1 is also provided with a microwave suppressor 303, which is connected to the microwave radiator 302. It should be noted that by combining micron-level spray drying and microwave drying components, liquid materials are atomized into micron-level droplets using a combination of nano-spray drying and microwave drying technologies. Then, hot drying gas is used to rapidly evaporate the solvent, initially removing it. Microwave drying continues, directly acting on the interior of the droplets to accelerate the evaporation of residual solvent. This method is particularly suitable for drying highly viscous, heat-sensitive materials that nano-spray drying cannot address. The dried material has uniform particle size, high content, and no obvious agglomeration. Compared to nano-spray drying or microwave drying alone, it offers a wider range of selectable materials, reasonable equipment cost, simple operation, low energy consumption, high output, convenient post-processing, and high product quality. It can be applied to the drying of substances that are difficult to dry completely, such as protein powder and alkali metal alkoxides.

[0017] Please see Figure 1 The drying tank 1 shown in the figure is equipped with a conveying assembly for conveying materials. The conveying assembly includes a liquid storage tank 401 located on the side of the drying tank 1 near the inlet. The liquid storage tank 401 is provided with a conveying pipe on the side near the drying tank 1. A liquid heater 402 and a feeding peristaltic pump 403 are sequentially provided on the side wall of the conveying pipe near the drying tank 1. It should be noted here that the conveying assembly is used to transport the solution and heat it during the transport process.

[0018] Please see Figure 1 The feed end of the drying tank 1 shown in the figure is equipped with a distributor 5, and the ultrasonic atomizer 204 and the feeding peristaltic pump 403 are respectively connected to the distributor 5. It should be noted here that the settings of distributor 5 are used to control the gas-liquid ratio and flow rate.

[0019] Please see Figure 1The drying tank 1 shown in the figure is equipped with a processing component for treating the internal dust. The processing component includes a bag filter 601 disposed on one side of the drying tank 1. The bag filter 601 is connected to the drying tank 1 through a dust suction pipe. A gas outlet 602 is provided on one side of the bag filter 601, and the gas outlet 602 is connected to an external vacuum pump 603 through a pipe. It should be noted here that, through the configuration of the processing components, after the sodium ethoxide material is dried, the high-purity nitrogen is filtered and dust removed by the bag filter 601 located at the bottom of the drying tank 1 and then discharged through the gas outlet 602. When the drying tank 1 is being cleaned, the vacuum pump 603 at the rear end of the gas outlet 602 can be turned on to perform vacuum drying on the cleaned system.

[0020] Working principle: The main target product of this embodiment is powdered sodium ethoxide. When drying the material, sodium ethoxide with a solution concentration of 10% is first stored in the liquid storage tank 401, and then transported to the drying tank 1 through the conveying pipeline. During the process of transporting the solution, the sodium ethoxide ethanol solution is heated to about 75°C by the liquid heater 402 installed on the conveying pipeline. Then, the sodium ethoxide ethanol solution is transported from the feed peristaltic pump 403 to the distributor 5 above the inlet of the drying tank 1.

[0021] Meanwhile, high-purity nitrogen is compressed by blower 201 above the other side of the inlet of drying tank 1. The high-purity nitrogen enters dehumidifier 202 through ventilation pipe for preliminary drying. Dehumidifier 202 is connected to gas heater 203 through ventilation pipe. Gas heater 203 heats the gas entering the system to 80-100℃. Then the heated gas is delivered to distributor 5 through ventilation pipe. Distributor 5 controls the gas-liquid ratio and flow rate. The gas-liquid ratio is controlled at about 1:1.2-1:1.6. Then, the material enters the ultrasonic atomizer 204 located at the top of the drying tank 1 from the distributor 5 for atomization (atomizing nozzle orifice diameter of about 20-50μm, atomization flow rate of about 100μL / min, ultrasonic frequency of 50kHz). After the droplets are formed, the diameter is about 50μm. Then, the magnetrons 301 (operating frequency of 1.5kHz, standing wave ratio of 1.1, microwave leakage of 1mw / cm2, the magnetrons 301 are cooled by water cooling and air cooling, the water cooling temperature is about 20-30℃, and the air cooling maintains the ambient temperature of about 20-25℃) are evenly distributed on both sides of the drying tank 1. Then, the magnetrons 301 are connected to the microwave radiator 302 located in the drying tank 1 through the waveguide. The microwave radiator 302 radiates and diffuses the received microwaves. The microwave suppressor 303 connected below the radiator can effectively suppress microwave leakage, thereby realizing the auxiliary drying of the material by means of microwave drying. After the sodium ethoxide material is dried, the high-purity nitrogen is filtered and dust removed by the bag filter 601 located at the bottom of the drying tank 1 and then discharged through the gas outlet 602. When the drying tank 1 is cleaned, the vacuum pump 603 at the rear end of the gas outlet 602 can be turned on to vacuum dry the cleaned system. Finally, the air hammer vibrator set at the bottom of the drying tank 1 is used to transport the material to the collection box 7. Therefore, by combining nano-spray drying technology and microwave drying technology, liquid materials are atomized into micron-sized droplets. Then, hot drying gas is used to rapidly evaporate the solvent, initially removing the solvent. Microwave drying is then applied directly to the inside of the droplets, accelerating the evaporation of residual solvent. This method is particularly suitable for drying heat-sensitive materials with high viscosity that nano-spray drying cannot solve. The dried material has uniform particle size, high content, and no obvious agglomeration. Compared with nano-spray drying or microwave drying alone, it offers a wider range of material selection, reasonable equipment cost, simple operation, low energy consumption, high output, convenient post-processing, and high product quality. It can be applied to the drying of substances that are difficult to dry completely, such as protein powder and alkali metal alkoxides.

[0022] Example 2 Please see Figure 2 This embodiment further illustrates Example 1. The discharge end of the drying tank 1 in the figure is connected to a collection box 7. The discharge port of the drying tank 1 is provided with a discharge assembly to prevent the material from forming a conical pile in the collection box 7. The discharge assembly includes a conical guide pipe 801 fixedly connected to the discharge port. A fixed pipe 802 is fixedly connected to the side of the conical guide pipe 801 near the collection box 7. The side of the fixed pipe 802 away from the conical guide pipe 801 is connected to an inclined discharge pipe 803 through a connecting assembly. A plurality of strip holes 804 are opened on the side of the discharge pipe 803 away from the drying tank 1. The fixed pipe 802 is provided with a drive assembly for driving the discharge pipe 803. It should be noted that, through the setting of the discharge component, when the dried material flows into the discharge end of the drying tank 1, it will be guided by the conical guide pipe 801 and then enter the discharge pipe 803 through the fixed pipe 802. Then, the drive component drives the discharge pipe 803 to rotate. Under the rotation of the discharge pipe 803, the dried material is circulated and accumulated near the inner wall of the collection box 7, thus forming a material pile that collapses from the outside to the center. This avoids the formation of a conical material pile in the center of the collection box 7, thereby reducing the risk of blockage at the discharge end of the drying tank 1 due to material accumulation and improving the smoothness of material collection.

[0023] Please see Figure 4 The connecting components shown in the figure include an annular dovetail hole 901 opened on the side of the fixed pipe 802 near the discharge pipe 803, and an annular dovetail plate 902 is rotatably connected to the annular dovetail hole 901. One end of the annular dovetail plate 902 is connected to the discharge pipe 803. It should be noted here that the connection components provide guidance and limit for the rotation of the discharge pipe 803.

[0024] Please see Figure 3 The driving assembly shown in the figure includes a fixed plate 1001 fixedly connected to the side wall of the fixed pipe 802. A motor 1002 is fixedly connected to the side of the fixed plate 1001 near the drying tank 1. A gear 1003 is fixedly connected to the output end of the motor 1002. A gear ring 1004 is fixedly connected to the side wall of the discharge pipe 803. The gear ring 1004 and the gear 1003 are meshed with each other. It should be noted that: through the configuration of the drive components, the motor 1002 drives the gear 1003 to rotate, and then the meshing transmission between the gear 1003 and the gear ring 1004 drives the discharge pipe 803 to rotate.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A micron-sized spray microwave combined drying device, comprising: Drying container (1); Its characteristic is that it further includes: A micron spray drying assembly and a microwave drying assembly are installed in the drying tank (1) for drying materials; The micron spray drying assembly includes a blower (201), a dehumidifier (202) and a gas heater (203) disposed on one side of the feed end of the drying tank (1). The blower (201), the dehumidifier (202) and the gas heater (203) are connected to each other by ventilation pipes. An ultrasonic atomizer (204) is provided inside the drying tank (1) near the feed inlet. The microwave drying assembly includes a magnetron (301) distributed on the side wall of the drying tank (1) for generating microwaves and a microwave radiator (302) for radiating microwaves. The magnetron (301) is connected to the microwave radiator (302) through a waveguide. The side wall of the drying tank (1) is also provided with a microwave suppressor (303), which is connected to the microwave radiator (302).

2. The micron-spray microwave combined drying device according to claim 1, characterized in that: The drying tank (1) is provided with a conveying assembly for conveying materials. The conveying assembly includes a liquid storage tank (401) located on the side of the drying tank (1) near the inlet. The liquid storage tank (401) is provided with a conveying pipe on the side of the drying tank (1). A liquid heater (402) and a feeding peristaltic pump (403) are sequentially provided on the side wall of the conveying pipe near the drying tank (1).

3. The micron-sized spray microwave combined drying device according to claim 2, characterized in that: The feed end of the drying tank (1) is provided with a distributor (5), and the ultrasonic atomizer (204) and the feeding peristaltic pump (403) are respectively connected to the distributor (5).

4. The micron-sized spray microwave combined drying device according to claim 3, characterized in that: The drying tank (1) is provided with a processing component for treating the internal dust. The processing component includes a bag filter (601) disposed on one side of the drying tank (1). The bag filter (601) is connected to the drying tank (1) through a dust suction pipe. A gas outlet (602) is provided on one side of the bag filter (601), and the gas outlet (602) is connected to an external vacuum pump (603) through a pipe.

5. The micron-sized spray microwave combined drying device according to claim 4, characterized in that: The discharge end of the drying tank (1) is connected to a collection box (7). The discharge port of the drying tank (1) is provided with a discharge assembly to prevent the material from forming a cone-shaped pile in the collection box (7). The discharge assembly includes a cone-shaped guide pipe (801) fixedly connected to the discharge port. A fixed pipe (802) is fixedly connected to the side of the cone-shaped guide pipe (801) near the collection box (7). The side of the fixed pipe (802) away from the cone-shaped guide pipe (801) is connected to an inclined discharge pipe (803) through a connecting assembly. Multiple strip holes (804) are opened on the side of the discharge pipe (803) away from the drying tank (1). The fixed pipe (802) is provided with a driving assembly for driving the discharge pipe (803).

6. The micron-spray microwave combined drying device according to claim 5, characterized in that: The connecting assembly includes an annular dovetail hole (901) opened on the side of the fixed tube (802) near the discharge tube (803), and an annular dovetail plate (902) is rotatably connected to the annular dovetail hole (901). One end of the annular dovetail plate (902) is connected to the discharge tube (803).

7. The micron-spray microwave combined drying device according to claim 6, characterized in that: The drive assembly includes a fixed plate (1001) fixedly connected to the side wall of the fixed pipe (802). A motor (1002) is fixedly connected to the side of the fixed plate (1001) near the drying tank (1). A gear (1003) is fixedly connected to the output end of the motor (1002). A gear ring (1004) is fixedly connected to the side wall of the discharge pipe (803). The gear ring (1004) and the gear (1003) are meshed with each other.

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