Plastic polyhedral hollow ball is one of the most common chemical tower packing.Its main material is PP polypropylene which can resist 100℃ at most.It is widely used for water treatment and exhaust treatment in drying tower, absorption tower, cooling tower, washing tower, regeneration tower and aeration tank.
Currently there are two different types of plastic polyhedral hollow ball.
Type one is polyhedral hollow ball with single hole as below
Type two is polyhedral hollow ball with double holes as below
Normally the polyhedral hollow ball are put into the tower or tank directly in random. Sometimes it will be put into a mesh bag or mesh box firstly then be throw into the aeration tank. About the polyhedral hollow ball with double holes, it can be put together with a stick like following picture
The plastic polyhedral hollow ball normally has four sizes. The details as below
| Specification | Number per volume | Specific area | Void Volume | Dry packing factor |
| D×H mm | n/m3 | m2/m3 | % | |
| 76 x 76 | 2600 | 150 | 92 | 193 |
| 50 x 50 | 10500 | 236 | 90 | 324 |
| 38 x 38 | 25000 | 325 | 87 | 494 |
| 25 x 25 | 64000 | 460 | 84 | 776 |
The normal material of plastic polyhedral hollow ball is PP, PE, PVC,CPVC. We can also produce other materail balls based on the special requirement of the customer. About the size and weight, there are also different types. Both size and weight of the polyhedral hollow ball could be customized.
The characteristic and advantage
1.The polyhedral hollow ball has 8 to 12 pieces at two parts of the ball. This structure can increase the surface area and get complete contact between the polyhedral hollow ball and the circulating medium. On the other hand, because of the radial scattered emission distribution, the medium is easier to circulate. It can also ensure the uniform distribution of the circulating medium and the contact force of each piece. All of these can successfully realize the maximum adsorption,efficient removal of impurity and increase the separation ability of the mass transfer.
2.On the plastic polyhedral hollow ball,the ball flap set on the upper surface are radially staggered with the lower surface. They are not symmetrical. This structure can ensure that the flowing medium in packing tower are separated by the ball flap which can create a impact and strong contact to increase the absorption capability.
3.On the surface of the ball flap,there are some raised burr which can increase the surface area of the polyhedral hollow ball and increase the circulation contact.It is good to improve the ability of removing impurity and separation of mass transfer.
4.The burr of the ball flap is normally pyramid type or hemispherical shape. It can further increase the contact surface between polyhedral hollow ball and circulating medium.
