Hot air jet multi-layer tunnel furnace

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1、 Hot air jet multi-layertunnel ovenMain technical parameters
1. Inner container size: width 1300 * height 1700 * depth 9300mm;
2. Dimensions (approximately): Width 1600 (excluding fan) * Height 2200 * Depth 9600mm;
3. Temperature range: adjustable from room temperature to+350 ℃ (customer temperature of 300 ℃);
4. Temperature fluctuation: ≤± 1 ℃;
5. Heating rate: ≤ 8 ℃/min;
6. Shell temperature: The temperature rise shall not exceed+15 ℃ of the environment, except around the door.
7. Circulating air mode: hot air jet circulating air;
8. Power supply: three-phase five wire system, 380V, 50HZ;
9. Total power: 150KW.
2、 Structural characteristics of multi-layer tunnel furnace box with hot air jet
1. Shell material: Made of 2.0mm thick cold-rolled steel plate (with comprehensive strength, plasticity, and welding performance) bent and welded;
2. Surface treatment: surface grinding, polishing, phosphating (which can increase the corrosion resistance of metals and the adhesion of paints) treatment; High temperature spray coating (large ripple type) can prevent rust and resist corrosion. The color is "computer gray".
3. Inner liner material: made of 1.5mm thick SUS304 stainless steel plate, keeping the inner liner clean, dust-free, rust proof, and corrosion-resistant;
4. Drum: Made of 45 # steel for grinding and surface spraying with PTFE layer;
5. Box frame: Made of 50 * 50 * 3mm angle iron and channel steel, it maintains the bearing strength of each surface inside and outside the box, and retains the coefficient of thermal expansion and contraction to prevent deformation of the box.
6. Thermal insulation material: using 100K encrypted aluminum silicate rock wool; It has the characteristics of non flammability and strong insulation, with a thickness of 150mm;
7. Sealing material: The sealing strip is made of asbestos strips, which can withstand temperature without deformation. The door and inner liner adopt a double-layer sealing form to enhance the sealing effect;
8. Ventilation device: There is a natural exhaust port and an air outlet duct on the furnace body, with a manual air regulating valve;
9. Wind knives: Three wind knives are installed on the top and five on the bottom of the single-layer furnace body, for a total of eight wind knives;
10. Door: Single door, 6 on each side of the tunnel furnace for a total of 12 doors, convenient for product insertion and baking. Each door is equipped with 3 chrome plated reinforced hinges to prevent sagging. 1 chrome plated explosion-proof square steel lock is installed, with strong pre tightening force and easy operation;
3、 Control system for multi-layer tunnel furnace with hot air jet
1. Electrical cabinet: equipped with an independent control electrical cabinet;
2. Air transport motor: 4KW high-pressure centrifugal fan, hot air jet circulation air transport (9 sets);
3. Heating tube: SUS304 stainless steel U-shaped heating tube made in Taiwan, China, China, with heat sink, can evenly distribute the temperature of the heating tube;
4. Air heating method: Air is fed into the heating duct trough through the tunnel furnace inlet. After heating, the air is sprayed and circulated inside the oven through the air knife nozzle, making temperature control more precise and uniform. The exhaust gas is discharged from the exhaust port, and a regulating valve is installed at the exhaust port;
5. Temperature controller: Taiwan, China Xuanrong H961 digital display temperature controller with PV and SV dual LED display function is adopted; Equipped with PID automatic tuning calculation output, precise control; Separate independent temperature control for the upper, middle, and lower layers (more precise control of the temperature uniformity of the box);
6. Overtemperature protection thermostat: adopting intelligent thermostat with PV and SV dual LED display function. When the temperature exceeds the set value of the overtemperature protection thermostat, the heating power supply will be automatically cut off;
7. Heating tube control: Taiwan, China Taisi SCR silicon controlled rectifier is used to control each group of heating tubes;
8. Temperature sensor: Omron 3-meter standard type, K-type thermocouple;
9. Other: Schneider brand control appliances are used;
4、 Function of hot air jet multi-layer tunnel furnace
1. Automatic constant temperature: The thermostat can automatically calculate the output power using PID according to the temperature value set by the user; When approaching the set temperature value, the output power decreases to achieve constant temperature control and save energy and electricity;
2. Overtemperature alarm: When the actual detected temperature exceeds the set value of the overtemperature protection thermostat, the heating power supply is automatically cut off, providing dual protection function;
3. Sound and light alarm: equipped with a buzzer alarm light.
4. Grounding protection: Safety grounding protection for structural components.
5. Power phase loss and phase sequence protection: equipped with phase sequence protectors.
5、 Environmental conditions of hot air jet multi-layer tunnel furnace
1. Environmental temperature: -5 ℃ -40 ℃;
2. Relative humidity: ≤ 85% RH;
3. Power supply: AC380V ± 10%, 50Hz;
6、 Hot air jet multi-layer tunnel furnace training
Free technical training.

Features: The air circulation system of the hot air circulation oven adopts a fan circulation air supply method, with uniform and efficient air circulation. The air source is driven by a circulating air supply motor (using a contactless switch) to drive the wind turbine through a heater, and then the hot air is sent out through an air duct to the interior of the oven. The used air is then sucked into the air duct to become the air source for further circulation and heating. Ensure indoor temperature uniformity. When the temperature value swings due to the action of opening and closing the door, the air supply circulation system quickly resumes operation until the set temperature is reached, and the hot air circulation heats and dries the product.