Overview of blade dryer
Paddle dryer is a continuous drying equipment that uses indirect heating as its core, combined with continuous stirring and efficient heat transfer. It is mainly used to process materials such as paste, paste, powder, filter cake, and viscous particles that are difficult to flow, especially suitable for large-scale continuous drying scenarios. Its core feature is to provide sufficient heating area through the jacket between the hollow blade and the shell, and to achieve rapid dehydration by uniformly heating the material through the forced stirring of the blade. Widely used in industries such as chemical engineering, environmental protection (such as sludge drying), food, medicine, mining, etc., typical processed materials include municipal sludge, chemical filter cake, food waste, pesticide intermediates, etc.

Working principle
The drying process of the blade dryer is based on the synergistic effect of "indirect heat transfer+mechanical stirring+continuous fluidization". The specific process is as follows: material feeding: the material to be dried (such as paste like sludge, filter cake, paste like intermediate) continuously enters the cylinder from the feeding port at one end of the dryer, and the feeding amount is controlled by valves or screw conveyors.
Heating and stirring: The dryer cylinder is a horizontal structure, with two (or more) sets of hollow blades that mesh with each other inside (the blade shaft and blades are both designed to be hollow), and the outer shell is equipped with a jacket. The heat medium (such as steam, heat transfer oil) transfers heat simultaneously through the hollow blade and shell jacket, forming a high-temperature heating surface (usually 50-200 ℃) on the surface of the blade and the inner wall of the cylinder.
After the material enters, the rotating blades (usually 5-30r/min) continue to stir, shear, and flip, on the one hand breaking the material into small particles or thin sheets, increasing the contact area with the heating surface; On the other hand, through the pushing effect of the blade, the material slowly moves along the axial direction of the cylinder (from the feeding end to the discharging end), during which the surface of the material continuously updates and comes into full contact with the heating surface, accelerating the vaporization of water or solvent.
Moisture/solvent removal: The moisture (or solvent) in the material vaporizes under heating, and the resulting steam can be discharged in two ways:
Atmospheric pressure type: carried away by natural ventilation or induced draft fan through the exhaust port at the top of the cylinder;
Vacuum type: Connected to a vacuum system, it lowers the boiling point under negative pressure, accelerates vaporization, and is discharged through a vacuum pipeline (suitable for materials that are thermally sensitive or require solvent recovery).
Continuous discharge: The dried material (usually with a moisture content of less than 10%, or even as low as 1%) is continuously discharged from the discharge port at the other end of the cylinder under the push of the blade, completing the drying cycle. The residence time of materials can be adjusted by blade speed, filling rate, or cylinder length (usually 10-60 minutes).

Main features 
Efficient heat transfer and fast drying speed: The hollow blade and jacket provide a large heat transfer area (unit volume heat transfer area can reach 80-200 m ²/m ³, far higher than the 10-30 m ²/m ³ of rake dryer), and the material is forcibly diluted and flipped by the blade, with low thermal resistance and high heat transfer efficiency (thermal efficiency can reach 70% -80%), suitable for large-scale continuous production.
Continuous operation, large processing capacity: Different from intermittent rake dryers, it can achieve full continuous feeding drying discharging, with a single equipment processing capacity of 0.5-50 tons/hour (based on dry materials), meeting the needs of industrial mass production.
Wide material adaptability: It can handle various forms of materials such as paste, paste, filter cake, viscous particles, and powder, especially suitable for sludge and filter cake materials with high moisture content (such as over 80%) (traditional fluidized bed drying is difficult to handle such high humidity materials).
Low energy consumption, energy-saving and environmentally friendly: Indirect heating does not require a large amount of hot air (different from hot air drying), resulting in minimal heat loss; And low-grade heat sources (such as waste steam and waste heat) can be utilized to reduce energy consumption; The enclosed structure reduces dust and exhaust emissions, making it suitable for environmentally demanding scenarios such as sludge drying.
Self cleaning and anti scaling: The gap between the blade and the cylinder wall is extremely small (usually 1-3mm), and it can scrape the inner wall during rotation, reducing material adhesion and scaling, and maintaining stable heat transfer efficiency (especially suitable for materials that are prone to scaling).

Technical Parameter

Model	YJG160	User	Seo
Material	Graphene	Final moisture content	160㎡
Initial moisture content	80%	Final moisture content	30%
Heat source	Steam	Equipment material	316L+Q235
Water evaporation rate	1000kg/h	Power supply	380V 50hz