Product Description
The Industrial Tunnel Microwave Dryer applies microwave energy directly to polar molecules such as water molecules inside materials, causing them to vibrate and rub at a high frequency of 2.45 billion times per second and convert into thermal energy. Thanks to the penetrability of microwaves, materials are heated simultaneously from inside to outside. During operation, materials are fed by the conveyor belt into the drying tunnel composed of multiple cascaded microwave heating chambers. Microwaves deliver penetrative heating to materials laid on the conveyor belt. Water within materials heats up and evaporates under microwave energy, while water vapor is promptly exhausted by the moisture‑removal system to achieve fast and uniform drying. Bacteria contained in materials are synchronously killed under the effect of microwave electromagnetic fields.
Main Advantages
1. High Efficiency & Energy‑Saving, Greatly Reducing Operating Costs
Microwave drying adopts penetrative internal heating. Electromagnetic energy directly acts on dielectric molecules and converts into heat energy, heating materials both internally and externally without relying on heat conduction. Compared with conventional hot‑air drying, the Industrial Tunnel Microwave Dryer delivers 30%‑50% energy savings while cutting drying time by 50%‑80%, with a thermal conversion efficiency of over 70%. It also saves more than 1/3 energy versus infrared heating. Each kWh of electricity saved equals 0.4 kg of standard coal conserved and 0.997 kg of CO₂ emission reduction.
2. Uniform Heating to Guarantee Product Quality
Equipped with microwave slot‑antenna energy‑feeding technology, the Industrial Tunnel Microwave Dryer achieves even microwave distribution inside the cavity for uniform material heating, high heat utilization and low microwave reflection. Microwaves penetrate into material interiors to realize simultaneous inside‑and‑outside heating, eliminating the over‑baked surface and under‑cooked core issue common in conventional heating. Drying temperature can be kept below 150 °C, minimizing loss of active ingredients in materials.
3. Intelligent Control for Easy Operation
The complete machine adopts PLC control with touch‑screen HMI. Multiple process curves can be set and stored. Stepless segmented adjustment is available for microwave power, and variable‑frequency regulation for conveyor speed, enabling precise control over drying temperature and duration for different materials. Fitted with imported infrared pyrometers, it offers high‑precision temperature control with temperature fluctuation ≤ 3 °C.
4. Built‑in Sterilization for Improved Hygiene & Safety
While completing dehydration, microwaves kill bacteria and microorganisms via thermal and biological effects. Microwaves modify or deactivate protein and nucleic acid molecular structures within microorganisms to realize sterilization. Fully automated and continuous processing avoids secondary pollution that may occur in traditional processing methods.
5. Assembly‑line Production: Large Capacity with Small Footprint
Featuring a tunnel‑type continuous conveying structure, the Industrial Tunnel Microwave Dryer supports intelligent and automated feeding & discharging. It delivers large daily throughput, high production efficiency with a small floor space. Automated drying lines with higher output and wider working width can be customized per client requirements.
6. Safe & Eco‑Friendly, Compliant with National Standards
Microwave suppressors are installed at inlet and outlet ports to keep microwave leakage ≤ 5 mW/cm² in compliance with national safety standards; certain models achieve leakage ≤ 1 mW/cm². Major components are made of 304 stainless steel, meeting GMP requirements for pharmaceutical equipment. The modular‑designed unit is easy to clean and generates zero dust pollution.
Equipment Composition
The Industrial Tunnel Microwave Dryer mainly consists of the following systems:
Component | Function Description |
|---|---|
Microwave Generating System | Generates microwave energy; core component: magnetron |
Microwave Heating Cavity | Where materials receive microwave heating and drying |
Material Conveying System | Equipped with PTFE mesh belt or polyester conveyor belt with variable‑frequency speed regulation |
Microwave Suppressor | Prevents microwave leakage to guarantee operational safety for the Industrial Tunnel Microwave Dryer |
Moisture & Heat Exhaust System | Timely discharges water vapor and excess heat |
Automatic Control System | PLC touch‑screen control; programmable storage of process parameters for the Industrial Tunnel Microwave Dryer |
Application Fields
The Industrial Tunnel Microwave Dryer is widely used for drying, sterilization, mildew prevention and other processes in food, chemical, pharmaceutical, wood, building material, paper product and other industries.
Food Industry: Tea fixation and drying, drying of agricultural products (chrysanthemum, honeysuckle, etc.), meat products, condiments, nutritional health products, instant noodles, bean products, puffed potato chips, etc.
Pharmaceutical Industry: Drying and sterilization of herbal pills, Chinese medicinal herbs, oral liquids, etc.
Chemical Industry: Drying, desulfurization, reduction and other treatments for chemical products
Wood / Building Materials: Wood drying, artificial quartz stone curing, stone material drying
Others: Drying treatment for textiles, printing & dyeing products, ceramics, leather, bamboo & wood products, paper products, etc.
