How to select a dryer.

Before choosing a dryer, you need to make a preliminary analysis of your drying needs:
Ingredients for particles: What are the physical properties of particles when they are wet or dry? What is the granularity distribution? Toxic, flammable, corrosive or abrasive?
Process requirements: What is the moisture content of the particles? Is the moisture evenly distributed inside the particles? What are the initial and final water content requirements for particles? What is the maximum allowable drying temperature and drying time for particles? Does the drying temperature need to be adjusted throughout the drying process?
Capacity requirements: Do materials need to be processed in batches or continuously? How much material must the dryer handle per hour? How long does it take to get a high-quality end product? How does the production process before and after drying affect the choice of dryer?
Quality requirements for finished products: Will the material shrink, degrade, over-dry, or be contaminated during drying? How uniform must its final moisture content be? What should be the temperature and volume density of the final product? Does the dried material produce dust or require secondary recovery?
The actual environmental condition of the factory: How much production space is available for drying in the factory? What is the temperature, humidity and cleanliness of the factory? What is the plant equipped with the right power resources, exhaust gas port? According to local environmental regulations, what is the amount of noise, vibration, dust and thermal energy loss allowed in the plant?
By considering these issues, some dryers that are not suitable for your actual production will be eliminated. For example, the physical or processing characteristics of raw materials will exclude some dryers, steam-type rotary tumble dryers for high water content, viscous large raw materials such as mica is not a good choice. The tumble dryer transports the material while drying it by rotating and rolling, but this passive delivery does not smoothly transport the viscous material to the mouth, as the viscous material sticks to the drum wall and steam pipe, or even clots. In this case, spiral conveyors or indirect multi-disc dryers are a better choice, this active delivery, can quickly transfer the mica from the feed port to the mouth.
Next consider a dryer that meets your actual footprint and production space. Exclude any dryers that are not suitable for existing production conditions or that require expensive renovation or expansion costs. Also consider the capital budget and operating costs and other factors.
If you choose a higher-performance dryer to optimize your existing drying process, you must consider whether other existing equipment, such as conveyors, dividers, wrapers, packaging machines, warehouses, and other equipment, can match the increased production of new dryers.
As the range of dryer options shrinks, use existing materials and existing production environments to actually test whether the dryer is really suitable.
■ The best drying conditions for existing materials.
■ The effect of the dryer on the physical properties of raw materials.
■ Whether the quality and characteristics of the dried material meet the requirements.
■ Whether the dryer capacity is appropriate.
Based on these test results, the manufacturer of the dryer can also provide detailed recommendations to fully meet your drying needs. Of course, the installation and operation costs of the dryer and the subsequent maintenance requirements of the dryer should not be ignored.
Taking all the above details into account, you can really buy the most suitable dryer.