Efficient drying equipment

Abstract

The utility model provides efficient drying equipment, which relates to the technical field of drying and comprises a feeding station, a heating station and a discharging station which are sequentially arranged. The heating station comprises a vacuum cover with an inlet and an outlet, the inlet is arranged close to the feeding station, the outlet is arranged close to the discharging station, and the inlet and the outlet are both provided with heating cavity doors capable of being opened and closed; the microwave heating mechanism comprises a plurality of microwave magnetrons, and the plurality of microwave magnetrons are arranged in the vacuum cover; and the air supplementing mechanism is connected with the vacuum cover. The microwave is utilized to generate high-frequency oscillation on the polar molecules so as to heat the water and evaporate the water, and the microwave only heats the water and has no heating effect on the material, so that the dried material does not need too much cooling time, and the production efficiency is improved. A vacuum environment is adopted as a heating environment, and water can be evaporated more easily by reducing the boiling point of water. The heating environment is a vacuum environment, so that the quality of the materials in the drying process is guaranteed, and the value is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drying, in particular to a high-efficiency drying device. Background Art

[0002] In the current polysilicon production process, after the polysilicon rods are crushed and screened, materials with a particle size of ≤8mm (silicon materials) and materials with a particle size of >8mm can be obtained. Materials with a particle size of ≤8mm include materials with a particle size of <2mm and materials with a particle size of 2 to 8mm (not limited to the above specifications and types).

[0003] The metal content on the surface of a material is one of the most important criteria for measuring its quality. For materials ≤8mm and >8mm of equal weight, the surface area of ​​the ≤8mm material is larger than that of the >8mm material. The risk of metal impurities being introduced to the surface of the ≤8mm material from the environment is higher. Therefore, materials ≤8mm currently have a high surface metal content, which lowers their quality and value. Specifically, this reflects the following technical issues:

[0004] 1. Low value: The surface of materials ≤8mm has many metal impurities, the product quality is low, and it is sold as a low-value product.

[0005] 2. Cost waste: The production of materials ≤8mm and large particles (>8mm) of the same quality requires the same raw materials and labor costs, but the value generated is different (the value of ≤8mm materials is low).

[0006] 3. Low drying efficiency. Currently, metal impurities on the surface of materials ≤8mm can be removed by water washing / pickling. However, after water washing / pickling, the water cannot evaporate quickly, resulting in low production capacity.

[0007] 4. Currently, materials ≤8mm are in direct contact with the environment during the drying process after cleaning, so the cleaned materials still cannot meet high quality standards. Utility Model Content

[0008] In view of the above situation, the present invention provides a high-efficiency drying device, aiming to solve the technical problems pointed out in the above background technology.

[0009] To achieve the above purpose, the present invention provides the following technical solutions:

[0010] The utility model provides a high-efficiency drying equipment, comprising: a feeding station, a heating station and a discharging station arranged in sequence;

[0011] Heating stations include:

[0012] A vacuum cover with an inlet and an outlet, wherein the inlet is arranged near the feeding station and the outlet is arranged near the discharging station, and both the inlet and the outlet are provided with a heating chamber door that can be opened and closed;

[0013] A microwave heating mechanism includes microwave magnetrons, wherein a plurality of microwave magnetrons are installed in a vacuum enclosure;

[0014] The air supply mechanism is connected to the vacuum hood.

[0015] In some embodiments of the present invention, the air supply mechanism includes a filter.

[0016] In some embodiments of the present invention, the vacuum enclosure includes a plurality of sequentially arranged heating zones, and each heating zone is provided with a microwave magnetron.

[0017] In some embodiments of the present invention, a material frame for containing materials is further included, and the material frame can pass through a feeding station, a heating station and a discharging station in sequence.

[0018] In some embodiments of the present invention, a conveying mechanism for conveying the material frame is provided between the feeding station and the discharging station.

[0019] In some embodiments of the present invention, the microwave magnetrons of any two microwave heating mechanisms face the same side of the material frame.

[0020] In some embodiments of the present invention, the microwave magnetrons of any two microwave heating mechanisms face different sides of the material frame.

[0021] In some embodiments of the present invention, the vacuum enclosure includes six heating zones.

[0022] In some embodiments of the present invention, the vacuum enclosure includes six heating zones, and the microwave magnetrons in each heating zone are distributed on five sides of the material frame.

[0023] In some embodiments of the present invention, the heating zones are interconnected.

[0024] The embodiments of the present invention have at least the following advantages or beneficial effects:

[0025] 1. Use microwaves to generate high-frequency oscillations on polar molecules (water) to increase the temperature of the water, thereby evaporating the water. Microwaves only heat the water and have no heating effect on the material, so the dried material does not require too much cooling time, thereby improving production efficiency.

[0026] Second, the heating environment adopts a vacuum environment, which can make the water evaporate more easily by lowering the boiling point of water, which is beneficial to improving the drying effect and reducing the subsequent cooling time.

[0027] 3. The heating environment adopts a vacuum environment, which is beneficial to ensure the quality of the material during the drying process, thereby increasing its value.

[0028] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a structural diagram of high-efficiency drying equipment;

[0031] Figure 2 This is a schematic diagram of the drying process of this application.

[0032] icon:

[0033] 1-material frame, 2-filter, 3-heating zone I, 4-heating zone II, 5-heating zone III, 6-heating zone IV, 7-heating zone V, 8-heating zone VI, 9-vacuum pump. DETAILED DESCRIPTION

[0034] In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention.

[0035] In the description of the embodiments of the present invention, it should be understood that the term "multiple" means two or more, unless otherwise clearly defined, and "several" means one or more, unless otherwise clearly defined.

[0036] In the embodiments of the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0037] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] See also Figures 1 and 2 This embodiment provides a high-efficiency drying device, including a feeding station, a heating station and a discharging station through which a material frame filled with material (such as silicon material with a particle size of ≤8 mm) can pass in sequence. A conveying mechanism (such as a conveyor belt or a conveyor roller) is provided between the feeding station and the discharging station for conveying the material frame, so that the material frame and the material pass through the heating station, thereby heating and drying the material.

[0039] The heating station includes a vacuum cover, a microwave heating mechanism and an air supply mechanism.

[0040] The vacuum hood is connected to a vacuum pump through a pipeline; the vacuum hood has an inlet and an outlet, the inlet of the vacuum hood is arranged near the feeding station, and the outlet of the vacuum hood is arranged near the discharging station, and the inlet and outlet of the vacuum hood are both provided with openable and closable heating chamber doors.

[0041] The microwave heating mechanism comprises microwave magnetrons, and a plurality of microwave magnetrons are installed in a vacuum cover.

[0042] The air supply mechanism is connected to the vacuum hood and is used to supply air into the vacuum hood when the vacuum hood replaces the vacuum environment (the inlet and outlet of the vacuum hood are switched to an open or closed state).

[0043] By setting up the vacuum cover, microwave heating mechanism and air supply mechanism, at least the following effects can be achieved:

[0044] After the material is washed / acid-washed, metallic impurities on the surface of the material are removed. After the metal impurities are removed, the material enters the vacuum environment of a vacuum hood and is heated using microwaves. Microwaves generate high-frequency oscillations on polar molecules (water), causing the water to heat up and evaporate. Microwaves only heat the water and have no effect on the material, eliminating the need for excessive cooling time after drying, thereby improving production efficiency. Furthermore, the vacuum environment used for heating lowers the boiling point of water, making it easier for the water to evaporate. This not only improves the drying effect but also reduces subsequent cooling time. Furthermore, the vacuum environment used for heating helps ensure the quality of the material during the drying process.

[0045] In this embodiment, preferably, the air supply mechanism includes a filter to filter metal particles in the air, so that during each replacement of the vacuum environment of the vacuum hood, the required air supply can be filtered to obtain clean air, further improving the quality of the material during the drying process.

[0046] In this embodiment, preferably, the vacuum cover includes a plurality of heating zones arranged in sequence, each heating zone is provided with a microwave magnetron, and the microwave magnetrons of any two microwave heating mechanisms face the same side or different sides of the material frame.

[0047] In a specific implementation scenario, each heating zone is interconnected and shares a common vacuum environment, so only one vacuum pump is required. In other embodiments, each heating zone may be equipped with a vacuum pump.

[0048] In one specific implementation scenario, the vacuum enclosure includes six heating zones: Heating Zone I, Heating Zone II, Heating Zone III, Heating Zone IV, Heating Zone V, and Heating Zone VI. Each zone is equipped with a microwave magnetron, located on five sides of the material frame (excluding the bottom). This means that multi-station heating is employed, with the microwave magnetrons at each station positioned in different directions to prevent overheating on one side of the material and microwave cancellation.

[0049] In combination with the above content, this embodiment has at least the following beneficial effects:

[0050] 1. Use microwaves to generate high-frequency oscillations on polar molecules (water) to increase the temperature of the water, thereby evaporating the water. Microwaves only heat the water and have no heating effect on the material, so the dried material does not require too much cooling time, thereby improving production efficiency.

[0051] Second, the heating environment adopts a vacuum environment, which can make the water evaporate more easily by lowering the boiling point of water, which is beneficial to improving the drying effect and reducing the subsequent cooling time.

[0052] 3. The heating environment adopts a vacuum environment, which is beneficial to ensure the quality of the material during the drying process, thereby increasing its value.

[0053] 4. The air supply mechanism includes a filter to filter out metal particles in the air. During each replacement of the vacuum environment of the vacuum cover, the required air supply is filtered to obtain clean air, further improving the quality of the material during the drying process.

[0054] 5. Use multi-station heating and install the microwave magnetron of each station in different directions to avoid overheating of one side of the material and the mutual cancellation of microwaves.

[0055] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will appreciate that the present invention is susceptible to various modifications and variations. The embodiments and features of the embodiments of this application may be combined arbitrarily without conflict. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A high-efficiency drying equipment, characterized in that, It includes feeding station, heating station and discharging station arranged in sequence; The heating station includes: A vacuum cover having an inlet and an outlet, wherein the inlet is arranged near the feeding station, and the outlet is arranged near the discharging station, and both the inlet and the outlet are provided with a heating chamber door that can be opened and closed; A microwave heating mechanism, comprising microwave magnetrons, wherein a plurality of the microwave magnetrons are installed in the vacuum enclosure; An air supply mechanism is connected to the vacuum cover.

2. The high-efficiency drying equipment according to claim 1, characterized in that: The air supply mechanism includes a filter.

3. The high-efficiency drying equipment according to claim 1, characterized in that: The vacuum cover comprises a plurality of heating zones arranged in sequence, and each of the heating zones is provided with the microwave magnetron.

4. The high-efficiency drying equipment according to claim 3, characterized in that: It also includes a material frame, which can pass through the feeding station, the heating station and the discharging station in sequence.

5. The high-efficiency drying equipment according to claim 4, characterized in that: A conveying mechanism for conveying the material frame is provided between the feeding station and the discharging station.

6. The high-efficiency drying equipment according to claim 4, characterized in that: The microwave magnetrons of any two of the microwave heating mechanisms face the same side of the material frame.

7. The high-efficiency drying equipment according to claim 4, characterized in that: The microwave magnetrons of any two of the microwave heating mechanisms face different sides of the material frame.

8. The high-efficiency drying equipment according to claim 3, characterized in that: The vacuum housing includes six heating zones.

9. The high-efficiency drying equipment according to claim 4, characterized in that: The vacuum cover comprises six heating zones, and the microwave magnetrons in each heating zone are distributed on five sides of the material frame.

10. The high-efficiency drying equipment according to any one of claims 3 to 9, characterized in that: The heating zones are communicated with each other.

Images