A rotary drum granulator is a molding machine that can make raw materials into a specific pellet shape. It is one of the key granulating machines manufactured by Tongda Heavy Industry, which is crucial equipment in the compound pellet fertilizer production line. Rotary drum granulator adopts the way of wet type granulation which means you should make your raw materials contain 25% to 30% moisture. Among Tongda’s all kinds of granulating equipment, the rotary drum pellet-making machine has the largest capacity and can reach 30 tons per hour. Therefore, by equipping our rotating granulator in an organic or compound fertilizer production line, your productivity will be greatly improved.
High Output Rotary Drum Granulator Introduction
The rotary drum granulator manufactured by us is used to make raw materials into granules in the specified shapes.
By adding a certain number of steams and vapors, raw materials in the rotary drum will become uniformly humid during the granulation process. Then a series of chemical reactions will occur. In this machine, the fertilizer particles squeeze each other and roll into fertilizer particles. The uniformly formed fertilizer particles are 3-4mm. With the continuous addition of raw materials rotating of the drum, a large-scale production, as well as the working efficiency, will be insured.
Features of the Rotary Drum Granulator
1. High granules out-put. The granulation rate can reach as high as 70%. So it is fit for large-scale fertilizer production.
2. Heat the raw materials by adding steam and vapors. Reduce the moisture of the granulated raw materials and therefore improve
the efficiency of the drying process.
3. The linings are made of rubber engineering plastics, which can efficiently get rid of the adhesion between the raw materials and the inside wall of the rotary drum.
4. Being made of anti-corrosive materials. Thus, it has a long service life.
5. Large production, low energy consumption, and easy maintenance.
6. Visible working process: Workers can solve the problems during the granulating process in time.
How does the Rotary Drum Pellet Granulator work?
The rotary drum granulator mainly adopts the wet granulation working principle. Before the beginning of granulation, you should add a certain amount of water or steam to the base fertilizer, Then after the raw materials are mixed wet in the cylinder, there will be semes of filly reacted chemically, and, under a certain sound conditions, the rotating motion of the cylinder starts to make a material particle get squeezed together into balls. It is perfectly available for pelletizing organic substances like vermicompost pellets, food waste granules, and cow manure fertilizer pellets.
What are the wear parts of the Rotary Drum granulator?
Rotary drum granulators are generally low maintenance, but some items can become worn, depending on the operating conditions, particularly if the drum falls out of alignment. The most common wear items for a drum granulator typically include the liner (where applicable), tumbling flights (where applicable), and potentially trunnion wheels, tires, and thrust rollers.
Rotary drum alignment is an important aspect of drum maintenance to prevent wear of the tires and trunnion wheels. When a drum falls out of alignment, it puts added stress on all components, encouraging undue wear.
Does the product exiting the granulator require drying?
Since the granulation process relies on a liquid binder to form and layer granules, the product exiting the granulator is wet and must be dried unless it is moving immediately to a downstream process that does not require drying (such as in the case of iron ore balling, where pellets go to a grate kiln).
Drying is typically carried out in a rotary dryer, which further rounds and “polishes” the granules as a result of the tumbling action that occurs as the drum rotates.
Is any other equipment required to support a rotary drum granulator?
Drum granulators require a feeding and offtake system to convey material into and away from the drum. They also typically require screens and a recycle circuit to recover overs and unders and recycle them back into the process.
Drum granulators are also typically followed by a rotary dryer and in some cases, may be preceded by a mixer for providing a homogeneous feedstock to the unit.
What does the design process look like?
Rotary drum granulator design typically begins with testing to assess the feasibility of granulating the intended material and to gather key process data such as percent fill, retention time, drum speed and slope, spray system design, and more.
Once the data has been gathered, engineers work off of this to size the drum and incorporate any necessary features or modifications needed to produce the desired product at the intended capacity.
Tongda rotary drum granulator is an efficient and reliable pellet production equipment, which has been widely used in many industries. With the continuous advancement of technology, rotary drum granulator will play a more important role in the future.