Tunnel Microwave Fixing Equipment

Main Advantages

1. Rapid Fixing with Outstanding Productivity High‑frequency electromagnetic waves directly target polar molecules such as water molecules inside fresh leaves to deliver volumetric heating. Raw materials reach enzyme‑deactivation temperature evenly within tens of seconds to 2‑3 minutes; the whole fixing cycle lasts merely 1.5‑3 minutes, 8 times faster than conventional pan‑firing. Featuring tunnel‑style continuous workflow, the unit supports round‑the‑clock operation to satisfy large‑volume production.

2. Premium End‑Product, Vivid Green Hue & Refreshing Aroma Low surface temperature during microwave fixing eliminates forced air cooling after processing. Chlorophyll remains largely intact for long‑lasting bright‑green color. Amino acids and vitamin‑C are well preserved for natural leaf appearance. Grass‑like off‑flavors evaporate while desirable aromatic compounds develop. No burnt leaves, scorched edges or debris are generated, delivering bright‑colored, well‑shaped tea with clean fresh fragrance.

3. Even Heating with Zero Blind Spots Electromagnetic waves generated by magnetrons irradiate materials uniformly for simultaneous internal‑and‑external heating. Constant material travel across microwave peaks and troughs further balances thermal distribution. It avoids common drawbacks of traditional processing including over‑cooked surfaces with under‑processed interiors, damp inner layers and burnt leaf edges.

4. Power‑Saving Performance for Low Operational Expense Microwave energy acts exclusively on feedstock rather than chamber walls or ambient air, eliminating redundant heat loss. It cuts power consumption by nearly 80 % compared with steam‑based fixing, and reduces energy costs to one‑third of thermal‑roller processing. Zero thermal inertia enables instant startup and shutdown for flexible operation.

5. Smart Automation for Simple Handling PLC touch‑screen control offers precise adjustment for temperature (80‑120 °C) and conveyor speed (0‑5 m/min). Advanced variants monitor moisture content and enzyme activity to auto‑tune microwave power and temperature. Built‑in temperature control, belt deviation correction, alarm triggers and video monitoring reduce manpower requirement to 1‑2 operators, versus 5‑6 staff needed for traditional workflows.

6. Integrated Sterilization & Mellowing Effect Thermal effects from microwaves suppress bacteria introduced during harvesting and manufacturing, bringing sterilization and mellowing functions. It notably mitigates bitter‑astringent notes for summer and autumn teas, a unique benefit unmatched by alternative machinery. Treated materials meet food‑grade sanitary standards for microbial count.

7. Safe & Eco‑Friendly, Optimized Workshop Conditions Microwave suppressors fitted at inlet and outlet keep leakage ≤ 5 mW/cm² complying with national safety regulations. The process generates excessive heat, smoke or noise, with zero waste water and exhaust emissions. It serves as an eco‑friendly solution for energy conservation and emission reduction.

8. Multi‑functional Unit to Lower Capital Investment Integrated fixing‑and‑drying continuous production is achievable. Around 30%‑40 % of material moisture is removed during fixing to reduce downstream drying costs. One single machine completes fixing, drying and sterilization, cutting equipment investment and saving factory floor space.

Equipment Composition

Application Fields