The drying time of the organic fertilizer production line drying process is generally 10-30 minutes, depending on the initial moisture content of the material, drying temperature, equipment type, and target moisture content. The core is to ensure the drying effect while avoiding excessive energy consumption or damage to fertilizer efficiency.

The drying time is not a fixed value, but the result of dynamic balance of multiple factors, and needs to be adjusted according to the actual production situation.

1. Core factors affecting drying time

The difference between initial moisture and target moisture is a key factor. The higher the initial moisture content of the material after granulation (such as 35% -40%), the lower the target moisture content (such as ≤ 20%), and the more moisture needs to be evaporated, resulting in a longer drying time, which may take 25-30 minutes; If the initial moisture content is low (such as 25% -30%) and the target moisture content is moderate (such as around 25%), the drying time can be shortened to 10-15 minutes.

Drying temperature: Within the appropriate temperature range (80 ℃ -120 ℃), the higher the temperature, the faster the water evaporation rate and the shorter the drying time. For example, drying at 110 ℃ -120 ℃ can shorten the drying time by 5-10 minutes compared to drying at 80 ℃ -90 ℃.

Drying equipment type: The retention time of materials varies greatly among different equipment.

Material characteristics: Different particle sizes and densities result in varying drying times. The smaller and looser the particles, the easier it is for hot air to penetrate, and the shorter the drying time; On the contrary, if the particles are large and have high density, it takes longer time.

2. Key principles for controlling drying time

Based on the target moisture content: The setting of drying time should revolve around "achieving the target moisture content", and cannot simply pursue speed. Real time detection of material moisture can be achieved through an online moisture monitor, and once it meets the standard, the material can be discharged to avoid excessive drying.

Matching with subsequent processes: The drying time should be synchronized with the production line speed to ensure that the dried materials can enter the cooling and screening stages in a timely manner, avoiding accumulation or material breakage, and ensuring the continuous and stable operation of the entire production line.

Balancing efficiency and cost: Excessive drying time will increase energy consumption (such as coal and natural gas consumption) and increase production costs; If it is too short, it may lead to incomplete drying and subsequent clumping and mold growth. We need to find the balance point of "efficiency cost effectiveness" through trial production.