How to choose a suitable heat exchanger in the field of food drying

How to choose a suitable heat exchanger in the field of food drying

The rotary heat exchanger, with its advanced technical principles and carefully designed solutions, has brought a new and efficient, energy-saving, and high-quality drying experience to the field of food drying, and is becoming the best choice for many food production enterprises to enhance their competitiveness. ​​

Selection design: Based on the specific needs of food drying, such as the type of food to be dried, production scale, drying process requirements, etc., accurately select the appropriate specifications of rotary heat exchangers. For example, for large-scale bread drying production lines, it is necessary to use large rotary heat exchangers with high processing air volume and high heat exchange efficiency; For small nut drying enterprises, small and compact heat exchangers are more suitable. ​
System integration: Cleverly integrate the rotary heat exchanger into the food drying system. Reasonably arrange heat exchangers between the exhaust gas discharge outlet and the fresh air inlet of the drying equipment to ensure that the exhaust gas can flow smoothly through the hot side of the impeller and the fresh air flows through the cold side. At the same time, through an intelligent control system, the speed of the rotary wheel and the flow rates of hot and cold fluids are accurately adjusted to meet the needs of different drying stages, ensuring the stability and efficiency of the drying process.
Energy saving and efficiency improvement: By recovering the heat from exhaust gas, the energy consumption during the drying process can be significantly reduced, reducing the use of fuel or electricity, lowering production costs, while improving drying efficiency and increasing output. ​
Improving quality: Stable drying temperature and humidity control helps ensure even drying of food, avoiding excessive or insufficient drying, enhancing the quality and taste of food, and reducing the rate of defective products. ​
Environmental sustainability: While reducing energy consumption, it also reduces the impact of exhaust emissions on the environment, which is in line with the production concept of green environmental protection. ​

Waste heat recovery system helps the leather industry save energy and reduce consumption

In the core processes of leather processing, including tanning, soaking, drying, dyeing, and finishing, traditional production techniques rely heavily on high energy consuming equipment such as steam boilers and thermal oil furnaces, resulting in energy waste rates of up to 40% -60%. Direct discharge of waste heat not only leads to low energy utilization efficiency, but also faces the risk of environmental fines.

Waste heat recovery system helps the leather industry save energy and reduce consumption
[Qi Yu] Waste Heat Recovery Solution
Zibo Qiyu has been deeply involved in the research and development of plate heat exchangers for 15 years. Based on the characteristics of leather technology, Qiyu has developed a three-level system of "pre recovery+deep recovery+intelligent management", achieving a waste heat utilization rate of ≥ 90% and reducing gas consumption by 40% -60%. working principle:
Using stainless steel plate heat exchangers, the waste heat (50-80 ℃) from tanning tanks and immersion tanks is recovered and used to preheat fresh water or chemical raw materials (such as tannin extract and dyes), thereby reducing steam consumption by 25% -35%. The reaction efficiency of preheated raw materials is increased by 20%, and the tanning cycle is shortened by 12%. Introducing waste heat pump technology to boost low-grade waste heat (30-50 ℃) to above 80 ℃ for constant temperature use in the dyeing workshop; Equipped with a digital management platform, real-time optimization of production line energy consumption models.
Our advantages:
We have jointly developed with the Department of Thermal Engineering at Tsinghua University and hold 12 patents for waste heat recovery;
Member unit of China Energy Conservation Association and Vice President unit of Shandong Energy Conservation and Environmental Protection Industry Association.
We will use plate heat exchangers to lock in every minute of heat energy, making green production within reach!
Please feel free to contact me at any time.

Air to air heat exchanger made of polymer PP material

Air to air heat exchanger made of polymer PP material

An air-to-air heat exchanger transfers heat between two air streams without mixing them, often used for energy recovery in ventilation systems, industrial processes, or HVAC applications. When made from polymer polypropylene (PP), it leverages the material’s unique properties to offer a lightweight, corrosion-resistant alternative to traditional metal-based designs.

Why Polypropylene?

    • Corrosion Resistance: PP is highly resistant to chemical degradation, making it ideal for environments with corrosive gases or pollutants where metals like aluminum or steel might degrade.
    • Low Thermal Conductivity: PP has a thermal conductivity of about 0.1–0.22 W/m·K, much lower than metals (e.g., aluminum at ~200 W/m·K). However, this limitation can be offset by designing thin walls and maximizing surface area to enhance heat transfer efficiency.
    • Lightweight: PP’s density (~0.9 g/cm³) makes it significantly lighter than metals, reducing installation and structural support costs.
    • Cost-Effective: PP is generally cheaper than metals like stainless steel or titanium, and its moldability supports scalable production.
  • Temperature Range: PP can operate effectively between -25°C to +100°C (or slightly higher depending on the grade), suitable for many air-to-air applications, though it’s less tolerant of extreme heat compared to metals.

    Air to air heat exchanger made of polymer PP material

    Air to air heat exchanger made of polymer PP material

Air Conditioner for Energy Storage Cabin Cooling

Air Conditioners for Energy Storage Cabin Cooling

Air Conditioners for Energy Storage Cabin Cooling

Energy storage cabins—housing batteries, inverters, or other heat-generating equipment—require precise cooling to maintain operational efficiency and equipment longevity. These cabins, often used in renewable energy setups (solar farms, wind energy storage), telecom systems, or off-grid power solutions, face unique challenges: compact space, high heat loads, and sometimes remote locations with limited power access. A well-chosen air conditioner ensures temperatures stay within safe ranges (typically 15°C–35°C for lithium-ion batteries) while optimizing energy use.

Air Conditioners for Energy Storage Cabin Cooling

Air Conditioners for Energy Storage Cabin Cooling

Why Wall-Mounted Air Conditioners?

Wall-mounted units, especially ductless mini-split systems, are a top choice for energy storage cabins:

    • Space Efficiency: Mounted high on a wall, they free up floor space in tight cabins (e.g., 10x10 ft or smaller).
    • Targeted Cooling: They cool only the cabin interior, not wasted external areas, unlike central systems.
    • Energy Savings: Inverter-driven compressors adjust cooling output to demand, reducing power draw compared to fixed-speed units.
  • Ease of Setup: No ducts needed—just a small wall hole for refrigerant lines and drainage.
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