Drying device for metal high-temperature antioxidant production

Abstract

The utility model discloses a drying device for metal high-temperature antioxidant production, and belongs to the technical field of drying equipment. A drying device for metal high-temperature antioxidant production comprises a tank body, a feeding pipe is arranged at the top of the tank body, a discharging pipe is arranged at the bottom of the tank body, a microwave generator is arranged on the side face of the tank body, the microwave generator is provided with a magnetron facing the interior of the tank body, and an air inlet pipe and an air outlet pipe are arranged at the top of the tank body; the heating device has the advantages of being high in heat conduction efficiency, reducing heat loss and achieving rapid heating.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to a drying device for producing high-temperature metal antioxidants. Background Art

[0002] High temperature oxidation refers to the process in which metal reacts with oxygen at high temperature to form metal oxides. The iron oxide generated during the heating process of steel is called iron oxide. When the billet is heated in the furnace, the oxidizing components in the furnace gas mainly include oxygen, water vapor, CO, sulfur dioxide, etc. In the heating process of the billet, the oxidation of steel is the result of the reaction between oxygen atoms and iron atoms. The oxygen atoms in the furnace gas diffuse from the outside to the inside through the surface of the billet, while the iron atoms diffuse from the inside to the outside of the billet. When the two atoms meet, they can react with oxidation under certain conditions. The higher the temperature, the more iron oxide is generated. Oxidation directly affects the quality and service life of steel, causing economic losses to enterprises. Metal high temperature antioxidant is a coating applied to the surface of steel to reduce the high temperature oxidation of steel during heating.

[0003] Antioxidants need to be dried during the production process or storage process to prevent them from absorbing moisture and causing qualitative changes and losing their own functions. In the prior art, in order to achieve the drying of antioxidants, they are usually placed inside a drying box and dried using a heat source or a cold source or even a vacuum adsorption method. For example, the invention patent with the announcement number CN114993006B discloses an efficient antioxidant drying device. The stirring and heating mechanism in the invention performs telescopic swing and rotation movement in the drying box, which can fully contact with the antioxidant inside the drying box to complete heat exchange, thereby improving the drying efficiency of the antioxidant; the utility model with the announcement number CN220304084U discloses a drying device for antioxidant production. The drying barrel in the utility model drives the antioxidant inside to change position by swinging, so as to achieve the purpose of uniform heating. The structure is simple and easy to use.

[0004] However, like other traditional drying equipment, the above scheme also converts electrical energy into internal energy to generate heat, and then transfers the heat energy to the antioxidant by other means to dry the antioxidant, such as the heating mechanism in the above invention, the drying barrel in the above utility model, etc. These structures themselves need to absorb heat during the operation, especially the drying barrel. According to the contents recorded in its manual, in addition to transferring heat to the antioxidant, the drying barrel itself will also dissipate a lot of heat. Therefore, a drying device with higher heat conduction efficiency and reduced resource waste is needed. Utility Model Content

[0005] The utility model aims to solve the problem of low heat conduction efficiency in the drying process of the drying device in the prior art, and proposes a drying device for producing high-temperature metal antioxidants.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A drying device for producing high-temperature metal antioxidants, comprising a tank body, a feed pipe is arranged on the top of the tank body, a discharge pipe is arranged on the bottom of the tank body, a microwave generator is arranged on the side of the tank body, the microwave generator is provided with a magnetron facing the inside of the tank body, and an air inlet pipe and an air outlet pipe are arranged on the top of the tank body;

[0008] A stirrer is arranged inside the tank;

[0009] The stirrer comprises a stirring shaft rotatably mounted in the tank body along a vertical direction, and a plurality of stirring blades are mounted on the stirring shaft. The stirring shaft and the stirring blades are respectively a plastic shell, a heat-insulating layer, and a metal body from the outside to the inside;

[0010] Two stirring blades form a group, and multiple groups of stirring blades are distributed on the stirring shaft at intervals along the vertical direction;

[0011] The angle between the stirring blade and the stirring shaft is between 30° and 45°, and the two stirring blades in the same group are rotationally symmetrical about the stirring shaft.

[0012] Furthermore, metal meshes for shielding microwaves are arranged inside the feed pipe, the air inlet pipe and the air outlet pipe.

[0013] Furthermore, the tank body includes an outer shell, the outer shell is made of metal, and an insulation layer is laid on the inner wall of the outer shell.

[0014] Furthermore, the interior of the thermal insulation layer is wrapped with an inner shell, the inner shell is made of plastic material, and the outer shell is provided with a microwave window for installing a microwave generator.

[0015] Compared with the prior art, the utility model provides a drying device for producing high-temperature metal antioxidants, which has the following beneficial effects:

[0016] The utility model discloses a drying device for producing a metal high-temperature antioxidant. When in use, an air inlet pipe is connected to an external air source, the metal high-temperature antioxidant is added from the feed pipe, and then a microwave generator is started to emit microwaves with a frequency of 915 MHz into a tank body through a magnetron, the microwaves act on the moisture in the antioxidant, and the heated moisture is discharged from the air outlet pipe after evaporation. Compared with the traditional method of using electric heating to dry the antioxidant, the device uses microwaves to dry the antioxidant, and the energy of the microwaves mainly acts on the water, without other intermediate structures for heat transfer, thereby reducing the heat absorption of the intermediate structure, reducing heat loss, improving heat conduction efficiency, shortening the heating time and realizing rapid heating.

[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is a three-dimensional schematic diagram of the internal structure of the tank body of the utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the tank body of the utility model;

[0022] Figure 5 For the utility model Figure 4 A schematic diagram of the structure enlargement of part A;

[0023] Figure 6 This is a schematic diagram of the structure of the agitator of the utility model.

[0024] In the figure:

[0025] 1. Tank body; 2. Microwave generator; 3. Feed pipe; 4. Air inlet pipe; 5. Air outlet pipe; 6. Controller; 7. Discharge pipe; 8. Stirring shaft; 9. Stirring blade; 10. Outer shell; 11. Insulation layer; 12. Inner shell; 13. Microwave window. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] Reference Figure 1-6 The utility model discloses a drying device for producing a high-temperature metal antioxidant, comprising a tank body 1, a feed pipe 3 is arranged on the top of the tank body 1, a discharge pipe 7 is arranged on the bottom of the tank body 1, a microwave generator 2 is arranged on the side of the tank body 1, the microwave generator 2 is provided with a magnetron facing the inside of the tank body 1, and an air inlet pipe 4 and an air outlet pipe 5 are arranged on the top of the tank body 1.

[0028] In the present application, the wind delivered through the air inlet pipe 4 is the dried air flow, and the air inlet pipe 4 can be connected to an external air compressor as an external wind source. When the microwave acts on the moisture in the antioxidant, the moisture evaporates from the inside of the antioxidant and is discharged from the air outlet pipe 5 driven by the air flow.

[0029] The microwave frequency emitted by the magnetron can be selected as 915MHz commonly used in industry, or other frequencies can be selected, and the specific selection is made based on the "skin depth" and the size of the tank body 1, the size of the stirrer, etc. Since microwaves will be fully reflected by metals and pass through plastic materials, and are almost completely absorbed by water molecules, after emitting microwaves into the tank body 1, the microwaves are reflected multiple times in the tank body 1 and directly act on the water molecules in the antioxidant from all directions to heat the water. First, the heat transfer efficiency is high, and second, no other heat-conducting structure is required, so the overall structure is also simpler.

[0030] A valve is installed on the discharge pipe 7, and the dried antioxidant is discharged from the discharge pipe 7.

[0031] Metal meshes for shielding microwaves are arranged inside the feed pipe 3, the air inlet pipe 4 and the air outlet pipe 5.

[0032] Either a metal mesh or a metal perforated plate can be used. A metal mesh with a suitable mesh size is selected and installed in the feed pipe 3, the air inlet pipe 4, and the air outlet pipe 5 to block microwave spillover and reduce microwave leakage without affecting the feed and air flow.

[0033] The tank body 1 comprises an outer shell 10 , which is made of metal. An insulation layer 11 is provided on the inner wall of the outer shell 10 .

[0034] The heat transfer of the antioxidant to the housing 10 during the drying process is reduced by the heat-insulating layer 11. Meanwhile, the metal housing 10 prevents microwaves from escaping and reflects microwaves to the antioxidant from all directions.

[0035] The heat-insulating layer 11 is wrapped with an inner shell 12 , which is made of plastic. The outer shell 10 is provided with a microwave window 13 for installing the microwave generator 2 .

[0036] The magnetron is located in the middle of the microwave window 13. The material for making the thermal insulation layer 11 can be rock wool board, foam plastic, etc. Since the material of the thermal insulation layer 11 is mostly water-absorbing material, in order to prevent the antioxidant from penetrating into the thermal insulation layer 11, a plastic inner shell 12 is used to isolate the antioxidant from contacting the thermal insulation layer 11. At the same time, the plastic inner shell 12 will not affect the propagation effect of the microwave.

[0037] The tank body 1 is provided with an agitator inside.

[0038] The main function of the stirrer is to stir the antioxidant and accelerate the heat flow inside the antioxidant.

[0039] The agitator comprises an agitator shaft 8 rotatably mounted in the tank body 1 along a vertical direction, and a plurality of agitator blades 9 on the agitator shaft 8. The agitator shaft 8 and the agitator blades 9 are respectively a plastic shell, a heat-insulating layer, and a metal body from the outside to the inside.

[0040] The metal body of the stirring blade 9 is welded to the metal body of the stirring shaft 8, the top end of the metal body of the stirring shaft 8 is connected to the working end of the driving motor, and the plastic shell and the insulation layer of the stirring shaft 8 and the stirring blade 9 are respectively wrapped on the outside of the metal body, thereby reducing the heat absorbed by the stirring shaft 8 and the stirring blade 9 in the antioxidant. At the same time, the stirring blade 9 continuously changes direction during the rotation process, further increasing the propagation path and reverse direction of the microwave in the tank body 1, so as to heat the moisture in the antioxidant from all directions.

[0041] Two stirring blades 9 form a group, and multiple groups of stirring blades 9 are distributed on the stirring shaft 8 at intervals along the vertical direction.

[0042] When the microwaves propagate through the stirring blades 9, a part of the microwaves propagate in one direction through the gap between the two groups of stirring blades 9, while the other part of the microwaves, after encountering the stirring blades 9, propagate in another direction under the total reflection of the stirring blades 9, thereby achieving the effect of multi-directional total reflection.

[0043] The angle between the stirring blade 9 and the stirring shaft 8 is between 30° and 45°, and the two stirring blades 9 in the same group are rotationally symmetrical about the stirring shaft 8 .

[0044] With this structure of the stirring blade 9, when microwaves reach the metal body surface of the stirring blade 9 from the upward side, the microwaves are mainly reflected upward and obliquely upward, and when microwaves reach the metal body surface of the stirring blade 9 from the downward side, the microwaves are mainly reflected downward and obliquely downward. The microwaves reflected in different directions reach the inner wall of the outer shell 10 and form total reflection again. After multiple total reflections in various directions, the effect of acting on the water in the antioxidant from various directions in the tank body 1 is achieved.

[0045] A controller 6 is installed on the side of the tank body 1, and a temperature sensor can also be installed inside the tank body 1. The probe of the temperature sensor passes through the insulation layer and the inner shell 12, and is used to detect the temperature change of the antioxidant. At the same time, a humidity sensor is installed in the air outlet pipe 5 to detect the humidity in the air discharged from the air outlet pipe 5, and is used to determine the moisture drying condition in the antioxidant. The controller 6 is electrically connected to the temperature sensor, the humidity sensor, and the microwave generator 2, and the operation of the device is controlled and monitored by the controller 6.

[0046] Working principle: When in use, connect the air inlet pipe 4 with the air outlet of the external air compressor, add the metal high-temperature antioxidant from the feed pipe 3, then start the microwave generator 2 and the stirrer, and transmit microwaves with a frequency of 915MHz into the tank body through the magnetron. After the microwaves pass through the insulation layer and the plastic layer, part of them directly act on the water molecules, and the other part reaches the surface of the stirring blade 9 and the outer shell 10 to form total reflection until it is absorbed by the water molecules. The water molecules absorb the microwave energy and the temperature rises. After volatilizing from the antioxidant, they are discharged from the air outlet pipe 5 driven by the airflow blown out from the air inlet pipe 4, and the dried metal high-temperature antioxidant is discharged from the discharge pipe 7.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A drying device for producing a high-temperature metal antioxidant, comprising a tank body (1), a feed pipe (3) being arranged at the top of the tank body (1), and a discharge pipe (7) being arranged at the bottom of the tank body (1), characterized in that: A microwave generator (2) is arranged on the side of the tank body (1), and the microwave generator (2) is provided with a magnetron facing the inside of the tank body (1); an air inlet pipe (4) and an air outlet pipe (5) are arranged on the top of the tank body (1); A stirrer is provided inside the tank body (1); The stirrer comprises a stirring shaft (8) rotatably mounted in a tank body (1) along a vertical direction, a plurality of stirring blades (9) on the stirring shaft (8), wherein the stirring shaft (8) and the stirring blades (9) are respectively composed of a plastic shell, a heat-insulating layer, and a metal body from the outside to the inside; Two stirring blades (9) form a group, and multiple groups of stirring blades (9) are distributed on the stirring shaft (8) at intervals along the vertical direction; The angle between the stirring blade (9) and the stirring shaft (8) is between 30° and 45°, and the two stirring blades (9) in the same group are rotationally symmetrical about the stirring shaft (8).

2. A drying device for producing high-temperature metal antioxidants according to claim 1, characterized in that: Metal meshes for shielding microwaves are arranged inside the feed pipe (3), the air inlet pipe (4) and the air outlet pipe (5).

3. A drying device for producing high-temperature metal antioxidants according to claim 1, characterized in that: The tank body (1) comprises an outer shell (10), the outer shell (10) is made of metal, and a heat-insulating layer (11) is provided on the inner wall of the outer shell (10).

4. A drying device for producing high-temperature metal antioxidants according to claim 3, characterized in that: The interior of the thermal insulation layer (11) is wrapped with an inner shell (12), the inner shell is made of plastic material, and the outer shell (10) is provided with a microwave window (13) for installing a microwave generator (2).

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