Mango Drying

A mango processing enterprise in Guangxi has been using coal-fired hot air drying for a long time, facing three major pain points: firstly, unstable temperature control, resulting in uneven color and sugar coking of dried mangoes; Secondly, the energy consumption cost is high, with a drying cost of over 800 yuan per ton; Thirdly, there is a great pressure on environmental protection, and it is difficult to meet the standards for coal-fired emissions. Therefore, the company has decided to introduce an air source heat pump drying system to achieve green production while ensuring quality.

1、 Customer demand

① Accurate temperature: requires constant temperature drying at 60-65 ℃ to avoid nutrient loss caused by high temperatures;

② Energy saving and efficient: Reduce target energy consumption costs by more than 50%;

③ Appearance optimization: Dried mango should maintain orange yellow transparency, no black edges, and a sugar retention rate of ≥ 80%.

2、 Drying process

Adopting a three-stage gradient drying method:

① Preheating stage (2 hours): 60 ℃ hot air rapidly evaporates surface moisture;

② Constant speed dehydration (12 hours): Continuous dehumidification at 65 ℃, with automatic adjustment of humidity sensor;

③ Drying stage (6 hours): Reduce to 55 ℃ and bake slowly to lock in sugar and fruit aroma.

3、 Customer reviews

After air source heat pump drying, the cost per ton has been reduced from 800 yuan to 360 yuan. The dried mango has a uniform color and soft texture, and the export order price has increased by 30%. The system runs fully automatically, reducing manual intervention by 70%. This case provides a benchmark demonstration of clean energy transformation for tropical fruit processing, and Jinlu Machinery specializes in customizing specialized drying solutions for customers.