1. Cost budget: Balancing initial investment and long-term operating costs

Initial investment: spray dryer>hollow paddle dryer>high-temperature rotary kiln dryer>drum dryer>vibrating fluidized bed dryer (under the same capacity);

Operating costs: focus on energy consumption (thermal efficiency) and labor costs:

2. Environmental compliance: Meet local emission requirements

Waste gas treatment: The drying process generates dust and volatile gases (such as ammonia from organic fertilizers), which require supporting dust removal, desulfurization, and denitrification equipment

Energy consumption type: choose according to the local energy cost (electricity, steam, natural gas, biomass fuel). For example, in areas where natural gas is cheap, natural gas heated drum dryers can be used. If there is no steam supply, electric heated spray dryers can be used.

3. Venue and operation: Ensure the feasibility of equipment landing

Site limitation: workshop height<5m → avoid selecting spray dryer (height is usually 8-15m); Due to the limited space, priority should be given to using a hollow blade dryer (with a small footprint);

Difficulty in operation and maintenance: The drum dryer has a simple structure and is easy to maintain; The inside of spray dryer is easy to scale, which needs regular cleaning and high maintenance cost;

Spare parts supply: Choose equipment with a large market share (such as rollers and vibrating fluidized beds), spare parts are easy to purchase, and after-sales response is fast.