Two Main Types Of Dryers In Hongxing
Rotary dryer is handling by bringing it into direct contact with a heated gas
. The dryer is made up of a large, rotating cylindrical tube,The dryer slopes slightly so that the discharge end is lower than the material feed end in order to convey the material through the dryer under.
The traditional cement rotating dryer:
The traditional dryer always heats air surrounding, and transports the hot air to roller around. The humid air resulted in this procedure will be excluded out, leaving dry air to keep drying. The traditional design does not recover the heat, and is therefore very inefficient. However, the traditional design is simple, reliable, and reasonable-priced.
Steam compression
limestone dryer:
This is a new developing dryer, more advanced than the conventional dryer. Its working principle is not to heat through the hot air. First, the material in roller is heated to 100C, then resulting damp and hot water vapor. After water vapor escaped out of roller, it will be collected and compressed. Under the pressure of tension, water vapor liquefies and produces heat, sending the heat back to roller, by which it can achieve recycling use of heat. The dryer on this technology, with its efficiency reaching double times of the traditional dryer, the drying time can also be reduced to that half of the traditional dryer.
Performance characteristics of Indirect heat transfer dryer:
The indirect heat transfer dryer made by our company is mainly used in building materials, metallurgy, and
cement plant for drying of limestone slag, coal powder, slag, and clay stone. This dryer is formed by rotary body, lifting blade, driving device, supporting device and sealing ring. The dryer has advantages of reasonable structure, high efficiency, low energy consumption and convenient for transportation.
Material to be dried enters the dryer, and as the dryer rotates, the material is lifted up by a series of internal fins lining the inner wall of the dryer. When the material gets high enough to roll back off the fins, it falls back down to the bottom of the dryer, passing through the hot gas stream as it falls. This gas stream can either be moving toward the discharge end from the feed end (known as co-current flow), or toward the feed end from the discharge end (known as counter-current flow).
The gas stream can be made up of a mixture of air and combustion gases from a burner, in which case the dryer is called a direct heated dryer. Alternatively, the gas stream may consist of air or another (sometimes inert) gas that is preheated. When the gas stream is preheated by some means where burner combustion gases do not enter the dryer, the dryer is known as an indirect-heated type. Often, indirect heated dryers are used when product contamination is a concern.
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