PGD Vertical Scraper Bottom Discharge Automatic Centrifuge With Bag Pulling Action
Product introduction
PGD1250N series centrifuge is a new type of centrifuge that can completely remove the residual cake.This series centrifuge retains such primary functions offered in the LGZ series as the solid-liquid separtion and scraper discharge,and adds such function as to remove the residual solid cake by shaking filter cloth with the removal rate higher the 99%.PGD series avoids crossing and mixing of different batches of separated products,and also eliminates the effects of the residual solid cake on the basket wall.it is mainly used in the solid-liquid separation process in such industries as pharmacy,food,gourmet powder and chemistry.
Operating principle
Material to be separated enters into the basket of the centrifuge that is rotating at high speed through a feeding pipe,and under action of the centrifugal force,the material passes through the filter cloth for filtration.Then the liquid phase discharges through the discharge pipeline,while the solid phase is retained in the basket.Feeding stops once the basket is filled with the material,then wash the solid cake,and discharge the washing liquid through filtration.The centrifuge continues to rotate to spin-dry the solid cake.After the solid meets the requirements for separation,the centrifuge reduces its speed,and removes the cake by means of the scraper,then discharges the cake out of the centrifuge.The centrifuge further reduces its speed so that the pneumatic shaking bag device moves reciprocally to shake off the residual solid cake,thus completely eliminating the solid cake
Operating process
Main features
- Liquid damping vibration isolator, No foundation for installation , the operation and maintenance are more convenient
- Big hinged cover construction form,easier maintenance and cleaning;
- Arch cover design with sufficient strength and rigidity can effectively prevent the influence of cover deformation on sealing performance;
- Movable liquid blocking plate design,convenient and quick to remove and replace the bag-shaking;
- The integrated design of main shaft and lifting cylinder makes the transmission structure more compact and reasonable;
- Humanization design: No foundation for installation, broad working platform, various warning and notice signs,etc.;
- The automatic bag-shaking device can remove the residual cake completely,so as to prevent crossing contamination between batches of materials;
- Safety protection device: over vibration protection, over current protection, overload protection,solid cake thickness detection,cover opening protection,speed monitoring,interlock protection,Nitrogen protection, etc. ,ensure the safety of the machine;
Technical Parameters
Nitrogen protection system
Nitrogen protection system is an option for customers when the machine working in flammable or explosive places,which can improve the safety of centrifuge used in these occasions,so as to reduce the use risk.
Fill a certain pressure of nitrogen into the closed centrifuge chamber to replace the air in the chamber, and reduce the oxygen content of the centrifuge to the safe range, and then keep the micro positive pressure in the centrifuge chamber all the time to ensure that the oxygen content in the centrifuge is within the safe range, so as to improve the safety of the centrifuge.
Before nitrogen filling, confirm whether the pressure, flow and nitrogen concentration of nitrogen source meet the use requirements:
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| Name |
Parameter |
Influence |
| Nitrogen filling pipe diameter |
D16 |
The smaller the nitrogen filling pipe diameter is, the longer the replacement time will be |
| Nitrogen source pressure |
2-3bar |
Slightly affect nitrogen filling replacement time |
| Nitrogen charging pressure (working condition) |
1.5bar |
Affect nitrogen filling replacement time |
| Nitrogen flow (standard condition) |
0.8-0.9m3/min(Large flow )+0.05m3/min(small flow) |
Affect nitrogen filling replacement time |
| Nitrogen consumption of large flow nitrogen filling(standard condition |
2.5-3m3 in 3 minutes |
Affect nitrogen filling replacement time |
| Nitrogen purity |
≥99% |
The lower the purity of nitrogen, the more times the replacement time of nitrogen filling and the oxygen content of centrifuge meet the requirements (conventional 4% ~ 6% |
Under the above conditions, it is found that the replacement time of
nitrogen filling is about 5 minutes when the oxygen content in the
centrifuge reaches 5%.
Customer use cases
Audited Supplier 
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