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Coconut shreds and coconut pith are byproducts of coconut processing and are widely used in gardening, building materials and environmental protection. However, fresh coconut shreds and coconut pith have a high moisture content (usually 50%-70%), and the moisture content needs to be reduced to 10%-15% through drying to meet storage and processing requirements. The traditional drying method is inefficient and limited by weather. When using a hot air dryer, the performance of the grate directly determines the thermal energy utilization efficiency and drying uniformity.
Malaysian coconut product processing companies have faced the following problems due to low dryer efficiency:
1. Uneven drying: some coconut pith agglomerates, and internal moisture remains, leading to the risk of mildew.
2. Excessive energy consumption: Traditional fixed grates do not burn fully, with heat losses of up to 30%.
3. Frequent maintenance: The grate is prone to dust accumulation and clogging, and needs to be shut down and cleaned daily, affecting production capacity.
The company introduced a drying system with adjustable speed chain grate, which has significant effects:
1. Efficient combustion
The grate adopts a segmented design, which adjusts the moving speed to match the combustion rate of biomass fuel (such as coconut shell) to ensure full combustion, improve thermal efficiency by 25%, and evenly distribute the air to avoid local high temperature and prevent the coconut shreds from being over-scorched.
2. Drying uniformity
The stable heating of the grate keeps the hot air temperature in the dryer constant (controlled at 120±5℃), and with the multi-layer conveyor belt, the moisture fluctuation of coconut bran is reduced from ±8% to ±2%.
3. Automation and durability
The automatic ash cleaning grate reduces manual intervention, and the maintenance cycle is extended to once a week. The high-temperature resistant alloy material can withstand long-term combustion and has a service life of more than 5 years.
