Dry Granulator
Dry granulation uses mechanical compression (slugs) or compaction (roller compaction) to facilitate the agglomeration of dry powder particles, while the wet granulation uses granulation liquid (binder/solvent) to facilitate the agglomeration by formation of wet mass by adhesion.
Advantages of Dry Granulator
Smaller space requirements
In material processing facilities, floor space is always at a premium. However, in comparison to wet granulation processes, dry granulation machines especially roller compactors generally take up much less space.
Control over particle size
Dry granulation offers better control over the particle size of the granules produced. Since the process involves compressing and compacting the powder mixture under high pressure, the resulting granules are more uniform in size and shape. This is important for tablet production, as tablets with a uniform size and shape are easier to swallow and have a consistent release rate.
Greater cost efficiency
In material processing facilities, the key to maximizing profits is adopting more cost effective processing techniques and technologies. Dry granulation serves as a lower cost method of processing powder and powder blends.It does not require the use of a liquid binding agent, which eliminates the need for separate moisture addition and material drying stages.
Improved stability and shelf life
Dry granulator offers improved stability and shelf life for pharmaceutical formulations. By reducing exposure to moisture, the granules produced through dry granulation exhibit enhanced chemical stability, ensuring the longevity and quality of the final product.
Why Choose Us
Factory
Our company covers an area of 15,000km2, including a building area of 6,000km2. We have more than 100 employees.
24h online service
We are happy to help our customers at any time as we have dedicated and hardworking service back end team working 24 hours.
Rich technical experience
Our staff are some of the most experienced in the industry, providing product-correct advice and solutions, ensuring we provide our customers with technical expertise and service.
Strict quality control
All machines undergo rigorous quality control at the factory to ensure that the quality of the machines we supply meets one of the highest standards.
Types of Dry Granulator
Double roller granulator
Double roller extrusion granulating machine is the best-sale dry granulation equipment. It can granulate many kinds of fertilizer materials, like sulphur limestone,organic fertilizer dry powder, etc;The pellets strength can be adjusted freely according to diferent materials. It's capacity is about 1-2t/h. It's truly that the roller granulator is more suitable for small scale compound fertilizer production lines.
Flat die granulator
You can use it for granulating dry poultry manure, making fertilizer granules from dry animal wastes, etc. In addition, the final organic ferilizer pellets are cylindrical with diameter between 3mm and 8mm. With suitable hardness and compact structure, they are not easy to be affected by water, even in rainy area, the granules produced by dry flat die organic fertilizer granulator can work well.
Dry Granulator Working Principle
Through the quantitative feeder, the raw materials are continuously supplied into the feeding hopper. The compactor uses a pair of rollers with holes that are spaced apart and rotate at the same speed in opposite directions. While one set of roller bearing seats in the frame remains fixed, the other set moves along the frame guide rails while being forced against one another by hydraulic cylinders. On the surface of the roll, numerous holes of the same size and form are consistently spaced apart, and the troughs are lined up with the troughs.At this point, the dry, powdery material is pressed and continually fed from above the two rollers into the space between them.The material initially flows freely before entering the area where the rollers would eventually bite it into the trough.
The material gradually occupies less space while being crushed over time as a result of the roller's continual revolution, achieving its maximum forming pressure.The pushed blocks then fall from the holes due to elastic recovery and self-weight and enter the crushing and screening mechanism as the pressure progressively lowers. The finished item is weighed, packed, and qualifies as a granular product. As the fine powder and unqualified large particles exit the powder port, they will re-enter the elevator's feeding port through the return auger, where they will be mixed with new materials and placed to the pre-feeding hopper before moving on to the next stage of the operation.
Application of Dry Granulator
Pharmaceutical industry
Within the pharmaceutical industry, the dry granulation process is primarily used to increase material flowability and prevent particle segregation, facilitating faster and more consistent feeding into the tableting process. By achieving and maintaining these conditions, pharmaceutical manufacturers are better able to produce pharmaceutical tablets and capsules with consistent weight, sufficient strength, and an even and predictable distribution of the active pharmaceutical ingredient (API).
Chemical industry
Similar to the pharmaceutical industry, the chemical industry often requires the physical properties of a powder to be improved. As such, employing dry compaction techniques and technologies can greatly facilitate their production. Typical applications are seen in battery mass production, fine chemicals, fertilizer and other agricultural products. Common chemicals processes are silica and carbon black.
Food beverage industry
The food and beverage industry relies on dry granulation for the production of tablets and pills (e.g., vitamins and supplements), as well as flavor extracts, instant blends, and other powder-based products.
Components of Dry Granulator
Feeding part
It is composed of motor reducer, tapered screw with unequal pitch, funnel, etc. It is mainly used for degassing and prepressing the material, and forcing the material into the pressing part.
Tablet pressing
It consists of motor, reducer, drive shaft, bearing, pressure wheel and so on. The pressure wheel is made of special stainless steel with pressure resistance, wear resistance, corrosion resistance and high strength after special heat treatment. Make the material through the press wheel after extrusion into a certain strength, thickness of the sheet.
Pelleting part
The pelleting part is composed of motor, reducer, frequency converter and screen, etc., the sheet material out of the pressing part is made into the required particles by two times, the above pelleting blade type, the following pelleting cage type, the size of the material is controlled by the mesh mesh.Finally, the appropriate particles are screened by the self-configured screen.
Hydraulic part
The hydraulic part is composed of electric hydraulic station,two oil cylinders, high-pressure tubing, cut off valve, pressure gauge and so on.The hardness required by the forming product is controlled by the pressure of the oil pump, the speed of feeding and the speed of the press wheel.
How to Maintain Dry Granulator
Refuel the dry granulator
Regularly refuel the transmission part of the dry granulator to ensure flexible rotation of the transmission part of the granulator and reduce the workload. Regularly replace the lubricating oil in the gear box of the granulator, and clean the feeding auger and conditioner at the same time to avoid accidents Mechanical failure.
Clean the lubricating oil system
Check and clean the lubricating oil system regularly, and measure the main motor bearing with vibration measuring instrument and infrared temperature measuring instrument and make a trend chart. If the trend value is exceeded, the idle current value or power value of the main motor is measured to determine whether the bearing needs to be replaced.
Check main motor
Regularly check the alignment between the output shaft of the main motor and the input shaft of the gear box. The alignment must be checked after starting up or replacing the bearing for three months. The clutch vibration speed test, if exceed the specified value should be readjusted dynamic balance.
Check cylinder system
Check the heating and cooling system of the cylinder regularly to ensure that the material is heated evenly and fully fused. If the dry extrusion granulator starts, the power curve of the main motor and the melt pressure curve increase momentarily, it indicates that the feeding amount of the feeding system is too large momentarily, and the feeding amount should be reduced.
Certifications
With rich experiences and consistent quality,kept qualifying the Chinese Enterprise with "AAA" credit rating and contract compliance, passed ISO9002 in 2003 got CE certificated in 2010, always led the powder and granules equipment market with dozens of patents.
Our Factory
Our company covers an area of 15,000km2, including a building area of 6,000km2. We have more than 100 employees.
FAQ