Food Drying Tunnel Oven Conveyor Belt Maintenance and Energy Saving Tips

Is your tunnel oven mesh belt jamming again? Or is the electric bill hurting you to look at? Don't be anxious! Dry ten years of food factory equipment maintenance of the old Zhang, today out of the heart to talk to you--The doorway to conveyor belt maintenance and saving money is actually hidden in the daily operation!​

First, routine maintenance: three strokes so that the mesh belt for three years more

​take: A cookie factory due to sesame card mesh, monthly shutdown slagging 8 hours, replaced this method and then did not block!

  1. ​Don't clean it.::

    • ✘ Never scrape hard with a wire brush! The Viton coating will be ruined once it's broken.
    • ✔️Soft brush + 70℃ warm waterFlush scum (heavy with oil? Add some cooking soda)
    • ✔️ For monthly useCompressed air blowing mesh(especially small particles like sesame seeds and scallions)

  2. ​Tension should be “just right”.::

    • Hand-pressure mesh belt in the middle ↓Sinking volume = mesh belt length × 1.5%(6 m mesh belt pressure ↓ 9 cm)
    • ✘ Too tight: motor current soars 30%, bearings burn in three months
    • ✘ Too loose: mesh belt slips and runs, cookies are crumbled

  3. ​Anti Rust and Anti Sticking Tips::

    Mesh Belt Type Maintenance Key Actions cyclicality
    ​stainless steels​ Spray 5% citric acid solution to neutralize salts 1 time per week
    ​Teflon​ Silicone grease fittings to prevent delamination 1 time per month

💡lesson learned through blood and tears::
Last year, I saw a factory with hydrochloric acid washing stainless steel mesh belt, the results of chloride ions corrosion of welded seams, mesh belt suddenly broke - 20 tons of cookies all paste in the furnace!Food equipment cleaners must look at the pH level!​

Second, in-depth maintenance: the golden time to save money on major repairs

​reach a conclusion after weighing a matter: When is it time for major maintenance?
​echo: Stop the furnace immediately if any of these three sounds occur!

  • ​creak→ Roller bearings are out of oil (add oil quickly)Food Grade Grease)
  • ​clank→ Chain pitch is elongated (must be replaced when measuring >1mm)
  • ​hissing→ Joint catch rubs against side plate (adjusts position of retaining rubber strip)

​Standard process of dismantling and washing::

markdownmake a copy of
1. Marking direction → Don't install the webbing in the opposite direction (arrow pointing in the direction of operation).  
2. Soaking formula → 60℃ water + 5% baking soda (soak for 2 hours to remove oil)  
3. Drying key → 24 hours in the shade (exposure to the sun will crack Teflon!)  




📌real case::

A factory tries to use hot air gun to bake the mesh belt quickly, and the result is that Teflon blisters and delaminates - 80,000 pieces of new belts are directly scrapped!






Third, energy-saving skills: electricity bills cut in half of the tawdry operation


​reach a conclusion after weighing a matter: Does motor inverter really save electricity?

​echo: Look at the measured data!






working condition
Fixed Frequency Mode Power Consumption
Inverter mode power consumption
power saving ratio






No-load warm-up (1 hour)
18 kW
9 kW
50%




Half-load operation
32 kW
25 kW
22%




full load operation
50 kW
48 kW
4%




(Measured data from a mooncake factory)









​Tougher energy-saving triple axe::


    

  1. 

    ​Exhaust Gas Recovery​
    

      

    • Furnace top exhaust pipe connectionStainless steel heat exchanger​
      • 

    • Can preheat fresh air to 80°C -Save 20% gas bill​
      • 

    

    2. 

  2. 

    ​Seam sealing​
    

      

    • Furnace door leaking? StickCeramic Fiber Seal(350°C resistant)
      • 

    • Energy consumption immediately reduced by 15% (infrared temperature measuring gun sweeping air leakage point a catch)
      • 

    

    3. 

  3. 

    ​Nightly Baking Materials Mystery​
    

      

    • Valley Electricity Rate = 1/3 during the day! putsMaterials with high water content(e.g. mushrooms, salami) moved to the evening baking
      • 

    • A dried meat factory saves 120,000 dollars a year in electricity costs with this trick.
      • 

    

    4. 





Fourth, the deadly minefield: these operations will kill you!


​reach a conclusion after weighing a matter: What is the biggest danger when it comes to maintenance?

​echo:.Reach out without powering down!Last year a worker used a hook to clear slag and rolled his cuffs into the main wheel...remember the iron rule:


    

  1. Inspection must be three steps:

      

    • Electricity box pull the gate → hang “someone working” sign → carry your own key
      • 

    

    2. 

  2. When lubricating:

      

    • Keep away from the drive wheels! UseExtended oil filler tubeReach in and operate.
      • 

    

    3. 

  3. Change the mesh belt:

      

    • Two people work together! One person pulls the belt and one person holds it. (If you do it alone, you'll get your hand cut by the edge of the belt.)
      • 

    

    4. 





⚠️Security Cold Knowledge::

The moment the stainless steel mesh belt breaks, the ejection speed is comparable to a bullet--Goggles must be worn during maintenance!​






Last words from Mr. Chang.


After all these years in the business, I've noticed an oddity.You're willing to spend $800,000 on a furnace, but you won't spend $8,000 on maintenance! What's the result? Enough motor repairs to buy three years of grease!


    

  • ​Personal Iron Law::

      

    • Save money on maintenance ≈ Scrap equipment early
      • 

    • Energy saving input ≈ 6 months payback for nothing
      
Next time you feel a hot bearing housing, think about this - it's much better to get an oil fill than to pray to God!
      • 

    

    •

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