Drying device for processing wear-resistant materials

Abstract

The utility model discloses a kind of drying devices for wear-resistant material processing, belong to wear-resistant material processing technical field.Its technical scheme is:including drying cabin, hot air circulation unit, heating unit, exhaust unit and controller;The top of drying cabin is provided with motor, the output end of motor is equipped with the shaft that inquires into the inside of drying cabin, the shaft in drying cabin is spaced and orderly equipped with several support net disc for holding wear-resistant material, several support net disc are mutually parallel arrangement, and can be rotated with shaft synchronization;The hot air circulation unit includes the air supply mechanism arranged on the top and at least one side wall of drying cabin, for forming hot air circulation flow field in the drying cabin;The heating unit includes at least two independent temperature control zones divided in drying cabin;The utility model realizes the drying of wear-resistant material, and heat energy recycling is efficient, and has internal dust removal capacity.

Description

Technical Field

[0001] This utility model belongs to the field of wear-resistant material processing technology, specifically relating to a drying device for wear-resistant material processing. Background Technology

[0002] Drying is a crucial step in the processing of wear-resistant materials (such as high-chromium cast iron, ceramic particles, and tungsten carbide cemented carbide) to remove residual moisture from casting molds, sprayed slurries, or after cleaning. Currently, the most widely used drying equipment in industry is the traditional box oven, tunnel furnace, or belt dryer.

[0003] These existing technologies have the following limitations: First, traditional equipment mostly uses static drying with a single hot air circulation method, making it difficult to ensure uniform heating of wear-resistant material workpieces with complex shapes or uneven packing densities. This easily leads to different evaporation rates of moisture inside and outside the workpiece, generating thermal stress, which in turn causes workpiece deformation or internal micro-cracks, seriously affecting its final mechanical properties and service life. Second, existing equipment generally has high energy consumption, and its high-temperature and high-humidity exhaust gas is directly emitted, carrying a large amount of latent heat and sensible heat, resulting in serious energy waste. In addition, dust generated by the wear-resistant material itself or its carrier during the drying process easily accumulates on the inner wall of the equipment, air ducts, and heat exchanger surfaces, not only contaminating subsequent workpieces and reducing thermal efficiency, but also posing a safety hazard of dust explosion. Manual cleaning of internal dust is not only labor-intensive but also poses safety risks. Utility Model Content

[0004] This utility model provides a drying device for processing wear-resistant materials, which realizes the drying of wear-resistant materials, and has efficient heat energy recycling and internal dust removal capabilities.

[0005] The technical solution of this utility model is as follows: A drying device for processing wear-resistant materials includes a drying chamber, a hot air circulation unit, a heating unit, an exhaust unit, and a controller. A motor is installed at the top of the drying chamber, and the motor's output end has a rotating shaft extending into the drying chamber. Several support trays for holding wear-resistant materials are arranged at intervals along the shaft inside the drying chamber. These support trays are parallel to each other and can rotate synchronously with the shaft. The hot air circulation unit includes an air supply mechanism installed at the top and at least one side wall of the drying chamber to form a hot air circulation flow field within the drying chamber. The heating unit includes at least two independent temperature control zones within the drying chamber. Each temperature control zone is equipped with an independent heater and temperature sensor, both of which are electrically connected to the controller. The exhaust unit includes an exhaust duct. The inner wall of the drying chamber has a smooth, dust-proof structure, and it is equipped with a gas cleaning mechanism inside, as well as a dust collection and discharge mechanism at the bottom.

[0006] Preferably, the air supply mechanism includes air supply ducts disposed on the top and side walls, at least one fan that provides airflow to all air supply ducts, and the air outlet of the fan is connected to the air supply ducts through the air supply duct.

[0007] Preferably, it also includes a heat exchanger, through which both the air supply duct and the exhaust duct pass to recover the heat from the air exiting the exhaust duct, thereby achieving preliminary heating of the air supply.

[0008] Preferably, five air supply pipes are provided, with one air supply pipe at the top of the drying chamber and two air supply pipes at the upper and lower ends of the two side walls of the drying chamber, respectively. The upper and lower air supply pipes are connected to horizontal air supply pipes. Air outlets are provided at the end of the air supply pipe at the top that extends into the drying chamber and in the circumferential direction of the horizontal air supply pipe.

[0009] Preferably, all corners of the drying chamber are rounded, and the inner wall panel is made of mirror stainless steel with a surface finish Ra≤0.8μm.

[0010] Preferably, the gas cleaning mechanism includes multiple compressed air nozzles arranged inside the drying chamber and around the air supply pipe and heater, a compressed air pipeline connected to the nozzles, and a solenoid valve for controlling the opening and closing of the pipeline. The solenoid valve is electrically connected to the controller and can be opened and closed according to a preset program to generate airflow to blow away accumulated dust.

[0011] Preferably, the ash collection and discharge mechanism includes: a U-shaped ash collection bottom formed at the bottom of the drying chamber, an ash discharge port opened at the lowest point of the ash collection bottom, and a retractable and sealed dust collection box connected below the ash discharge port.

[0012] Preferably, the wall panels of the drying chamber are made of ceramic fiber insulation board with a thickness of not less than 200 mm.

[0013] A labyrinth seal is installed where the shaft passes through the top of the drying chamber. The labyrinth seal is a commercially available and common structure. Above the labyrinth seal (i.e., outside the drying chamber), an annular negative pressure exhaust hood is installed. This exhaust hood is connected to the main exhaust duct or a separate miniature exhaust fan via a branch pipe.

[0014] The supporting mesh is a modular structure, with a fixed perforated plate at the bottom and several hinged movable baffles around it.

[0015] Compared with the prior art, this utility model has the following advantages: 1. This utility model combines multi-directional airflow from the top and side walls with a rotatable support mesh to ensure that the workpiece is evenly enveloped by hot air, thus improving drying efficiency. Independent zoned temperature control technology ensures the stability of the longitudinal temperature field within the drying chamber, preventing localized overheating or undercooling.

[0016] 2. The gas-to-gas heat pipe heat exchanger efficiently recovers heat from the exhaust gas and uses it to preheat the fresh air, which greatly reduces the energy consumption for heating the fresh air.

[0017] 3. The self-cleaning system, consisting of a gas cleaning mechanism and a U-shaped dust collection base, can automatically remove internal dust on a regular basis, fundamentally eliminating pollution, equipment failure (such as heater burnout), and explosion risks caused by dust accumulation.

[0018] 4. Install a series of compressed air nozzles at key dust accumulation points such as the horizontal air duct and around the heater. Linked with a PLC controller, these nozzles can automatically start according to a preset cycle (e.g., after each drying batch is completed). The instantaneous high-pressure pulsed airflow effectively blows off the dust adhering to the surface, and the blown-off dust is discharged with the exhaust system. This achieves online cleaning without shutting down the system, greatly reducing the labor intensity and risks of manual cleaning. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] In the diagram, 1. Drying chamber; 2. Motor; 3. Rotating shaft; 4. Support mesh tray; 5. Heater; 6. Air supply duct; 7. Fan; 8. Air supply horizontal pipe; 9. Heat exchanger; 10. Ash collection bottom; 11. Ash discharge port; 12. Dust collection box; 13. Air supply duct; 14. Exhaust duct. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model.

[0022] Example 1 like Figure 1 As shown, this embodiment provides a drying device for processing wear-resistant materials, including a drying chamber 1, a hot air circulation unit, a heating unit, an exhaust unit, and a controller; A motor 2 is installed at the top of the drying chamber 1. The output end of the motor 2 is provided with a rotating shaft 3 that extends into the interior of the drying chamber 1. Several support mesh trays 4 for holding wear-resistant materials are arranged at intervals on the shaft of the rotating shaft 3 inside the drying chamber 1. The support mesh trays 4 are arranged parallel to each other and can rotate synchronously with the rotating shaft 3. All corners of the inner cavity of the drying chamber 1 are rounded, and the inner wall panel is made of mirror stainless steel plate with a surface finish Ra≤0.8μm. The wall panel of the drying chamber 1 is made of ceramic fiber insulation board with a thickness of not less than 200mm.

[0023] The hot air circulation unit includes an air supply mechanism installed on the top and at least one side wall of the drying chamber 1, used to form a hot air circulation flow field within the drying chamber 1; the air supply mechanism includes air supply pipes 6 installed on the top and side walls, at least one fan 7 providing airflow to all air supply pipes 6, the air outlet of the fan 7 being connected to the air supply pipes 6 via an air supply pipe 13, and also includes a heat exchanger 9, the air supply pipe 13 and the exhaust pipe 14 both passing through the heat exchanger 9, used to recover the heat of the air exiting the exhaust pipe 14, achieving preliminary heating of the supplied air; the heat exchanger 9 is a gas-to-gas heat pipe heat exchanger; five air supply pipes 6 are provided, one air supply pipe 6 is provided on the top of the drying chamber 1, and two air supply pipes 6 are respectively provided at the upper and lower ends of the two side walls of the drying chamber 1, the upper and lower air supply pipes 6 being connected to horizontal air supply pipes 8; The heating unit includes a drying chamber 1 divided into at least two independent temperature control zones. Each temperature control zone is equipped with an independent heater 5 and a temperature sensor. The heater 5 and the temperature sensor are electrically connected to the controller. The exhaust unit includes an exhaust duct 14; The inner wall of the drying chamber 1 is a smooth, dust-proof structure. It is equipped with a gas cleaning mechanism inside and a dust collection and discharge mechanism at the bottom. The gas cleaning mechanism includes multiple compressed air nozzles arranged around the horizontal air supply pipe 8 and the heater 5 inside the drying chamber 1, compressed air pipelines connected to the nozzles, and solenoid valves that control the opening and closing of the pipelines. The solenoid valves are electrically connected to the controller and can be opened and closed according to a preset program to generate airflow to blow away the accumulated dust.

[0024] The dust collection and discharge mechanism includes: a U-shaped dust collection bottom 10 formed at the bottom of the drying chamber 1, a dust discharge port 11 opened at the lowest point of the dust collection bottom 10, and a retractable and sealed dust collection box 12 connected below the dust discharge port 11.

[0025] A labyrinth seal is installed at the point where the rotating shaft 3 passes through the top of the drying chamber 1. The labyrinth seal is a commercially available and common structure. Above the labyrinth seal (i.e., outside the drying chamber), an annular negative pressure exhaust hood is installed. This exhaust hood is connected to the exhaust duct via a branch pipe.

[0026] The supporting mesh disk 4 is a modular structure, with a fixed perforated plate at the bottom and several hinged movable baffles around it.

[0027] Work process: Spread the material evenly on each layer of support mesh 4, confirm that the edges of the support mesh 4 are in the upright position, and close the hatch.

[0028] When the blower 7 is started, hot air is evenly delivered into the drying chamber 1 through the air supply pipes 6 on the top and side walls, forming a hot air flow field. The delivered air is heated by the heater 5 with independent temperature control and then blows and dries the material. At the same time, the motor 2 drives the rotating shaft 3 and the supporting mesh plate 4 to rotate slowly.

[0029] The exhaust unit operates continuously to expel the hot and humid exhaust gas from the chamber. The exhaust gas exchanges heat with the introduced fresh air in the heat exchanger, and the preheated fresh air is sent into the drying chamber 1 through the air supply duct 13, achieving energy saving.

[0030] During or after the drying interval, activate the pulse gas cleaning mechanism. The solenoid valve opens instantly, and compressed air is ejected at high speed from the nozzle, blowing away the accumulated dust on the surface of the air supply pipe 8 and heater 5. The blown-off dust falls into the U-shaped dust collection bottom under gravity and eventually collects in the sealed dust collection box. Operators can periodically remove the dust collection box 12 for cleaning.

[0031] Once drying is complete, the equipment stops heating and rotating, discharges the material, and completes the unloading process.

[0032] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, it is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the present invention, and all such modifications or substitutions should be within the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A drying device for processing wear-resistant materials, characterized in that, Includes a drying chamber (1), a hot air circulation unit, a heating unit, an exhaust unit, and a controller; A motor (2) is installed on the top of the drying chamber (1). The output end of the motor (2) is provided with a rotating shaft (3) that extends into the interior of the drying chamber (1). Several support mesh trays (4) for holding wear-resistant materials are arranged at intervals on the shaft of the rotating shaft (3) inside the drying chamber (1). The several support mesh trays (4) are arranged in parallel to each other and can rotate synchronously with the rotating shaft (3). The hot air circulation unit includes an air supply mechanism disposed on the top of the drying chamber (1) and at least one side wall, for forming a hot air circulation flow field within the drying chamber (1); The heating unit includes a drying chamber (1) divided into at least two independent temperature control zones. Each temperature control zone is equipped with an independent heater (5) and a temperature sensor. The heater (5) and the temperature sensor are electrically connected to the controller. The exhaust unit includes an exhaust duct (14); The inner wall of the drying chamber (1) is a smooth, dust-proof structure, and it is equipped with a gas cleaning mechanism inside and a dust collection and discharge mechanism at the bottom.

2. The drying apparatus for processing wear-resistant materials as described in claim 1, characterized in that, The air supply mechanism includes air supply pipes (6) disposed on the top and side walls, and at least one fan (7) that provides airflow to all air supply pipes (6). The air outlet of the fan (7) is connected to the air supply pipes (6) through the air supply pipeline (13).

3. The drying apparatus for processing wear-resistant materials as described in claim 2, characterized in that, It also includes a heat exchanger (9), and the air supply duct (13) and exhaust duct (14) all pass through the heat exchanger (9) to recover the heat of the air coming out of the exhaust duct (14) and achieve the initial heating of the air supply.

4. The drying apparatus for processing wear-resistant materials as described in claim 2, characterized in that, Five air supply pipes (6) are provided. One air supply pipe (6) is provided on the top of the drying chamber (1). Two air supply pipes (6) are provided on the upper and lower ends of the two side walls of the drying chamber (1). The upper and lower air supply pipes (6) are connected to air supply horizontal pipes (8).

5. The drying apparatus for processing wear-resistant materials as described in claim 1, characterized in that, All corners of the inner cavity of the drying chamber (1) are rounded, and the inner wall panel is made of mirror stainless steel plate with a surface finish Ra≤0.8μm.

6. The drying apparatus for processing wear-resistant materials as described in claim 4, characterized in that, The gas cleaning mechanism includes multiple compressed air nozzles arranged around the air supply pipe (8) and heater (5) inside the drying chamber (1), a compressed air pipeline connected to the nozzles, and a solenoid valve for controlling the opening and closing of the pipeline. The solenoid valve is electrically connected to the controller and can be opened and closed according to a preset program to generate airflow to blow away the accumulated dust.

7. The drying apparatus for processing wear-resistant materials as described in claim 1, characterized in that, The dust collection and discharge mechanism includes: a U-shaped dust collection bottom (10) formed at the bottom of the drying chamber (1), a dust discharge port (11) opened at the lowest point of the dust collection bottom (10), and a removable and sealed dust collection box (12) connected below the dust discharge port (11).

8. The drying apparatus for processing wear-resistant materials as described in claim 1, characterized in that, The wall panels of the drying chamber (1) are made of ceramic fiber insulation board with a thickness of not less than 200 mm.

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