The gas multi-layer mesh belt leisure food dryer is a continuous, large-scale, and precise temperature controlled drying equipment designed specifically for puffing, frying, baking, fruit and vegetable crisps and other leisure foods. Its core advantages include efficient gas heating, multi-layer mesh belt continuous conveying, and intelligent temperature and humidity control, which is suitable for large-scale, multi variety, and high hygiene food production.
1, Core structure and conveying system
Multi layer ribbon architecture
The mainstream is 3-7 layers of food grade 304/316 stainless steel mesh belt (aperture 2-8mm optional), with a width of 1.2-2.0m and a length of 5-40m that can be customized.
The material is evenly spread from the top layer, falling layer by layer with the mesh belt and passing through in an S-shape to achieve gradient drying (high-temperature dehumidification in the upper layer, constant temperature drying in the middle layer, and low-temperature slow drying in the lower layer).
Transmission and speed regulation
Each layer is driven by an independent variable frequency motor, with a mesh belt speed of 0.1-1m/min infinitely adjustable, and a total drying time of 0.5-5 hours precisely controlled.
Equipped with tensioning and correction mechanisms, it runs smoothly, without deviation or material accumulation.
Laying and discharging materials
Front end uniform fabric device, adjustable material thickness of 10-80mm; Automatic unloading at the end and connection to the packaging line.
2, Gas heating and hot air circulation system (core performance)
Gas heat source
Using natural gas/liquefied gas direct combustion heating, with a thermal efficiency of over 85%, saving more than 30% energy compared to electric heating.
Fast heating and sensitive response, reaching the set temperature in 5-10 minutes.
The temperature control range is room temperature -300 ℃, with an accuracy of ± 1 ℃.
Hot air circulation and penetration
The high-pressure fan drives hot air to vertically penetrate the material layer (with adjustable wind speed of 0.5-1.5m/s), and the heat transfer efficiency is 3-5 times that of static drying.
Each layer has independent air ducts with adjustable forward/reverse flow to ensure uniform heating and dehydration of materials.
Moisture removal and waste heat recovery
Top/side automatic dehumidification system, with a dehumidification capacity of 0-3000m ³/h controlled by frequency conversion.
Standard waste heat recovery device, recovering 30-50% of exhaust gas heat to preheat fresh air, further saving 20-40% energy.
3, Intelligent control system
PLC+touch screen
One click setting/storage of process parameters such as temperature, humidity, mesh belt speed, air volume, time, etc.
Real time display of operating status, temperature and humidity curves, and fault alarms.
Temperature and humidity linkage control
Each layer is equipped with built-in temperature and humidity sensors (accuracy ± 1 ℃/± 2% RH), which automatically match the dehydration stage:
High humidity stage (>60%): high temperature+large dehumidification, quickly removing surface water
Constant speed stage (30-60%): constant temperature+stable wind speed, uniform migration of internal moisture
Speed reduction stage (<30%): Low temperature+small dehumidification, anti coking, and crispy preservation
Safety and Traceability
Overtemperature/overpressure/shutdown protection, gas leakage alarm; Support data recording and export to meet HACCP and food traceability requirements.
4, Food hygiene and material properties
Full food grade stainless steel
All contact material components such as frames, mesh belts, hoppers, air ducts, door panels, etc. are made of SUS304/316 with a thickness of ≥ 1.5mm and polished welds.
No dead corners, easy to disassemble, washable/disinfectable, in compliance with GB 16798 food machinery hygiene standards.
Sealing and Cleanliness
The whole machine is designed in a closed manner to reduce heat loss and dust spillage; Optional dust removal/purification device to meet the requirements of SC/QS production environment.
5, Capacity and energy consumption (typical parameters)
Processing capacity: 100-1000kg/h (customized by layers, length, and material type)
Unit energy consumption: 0.3-0.6m ³ natural gas/kg water evaporation (much lower than electric heating)
Dimensions: length 5-40m, width 1.5-2.5m, height 2.5-4.5m (modular combination)
Installed power: 30-80kW (mainly used for fans, transmission, and control)
6, Suitable for leisure food category
Puffed foods: potato chips, shrimp strips, crispy rice balls, rice cakes, and doughnuts
Fried/baked: nuts, peanuts, melon seeds, cookies, dried bread
Fruit and vegetable crisps: apple, banana, carrot, mushroom, okra crisps
Others: spicy sticks, dried tofu, dried meat, pet snacks, instant cereals
7, Summary of Core Advantages
Efficient and energy-saving: Gas direct combustion+waste heat recovery, with comprehensive energy consumption 40-50% lower than electric heating
Continuous and stable: 24-hour uninterrupted production, with a daily processing capacity of tens of tons per machine
Uniform quality: multi-layer gradient drying+hot air penetration, consistent color, crispness, and moisture content
Flexible adaptation: adjustable parameters, multi-purpose, suitable for various leisure food processes
Health and safety: Made of all stainless steel and easy to clean, in compliance with GMP standards for food production