penjelasan tentang alat rotary vacum filter

This equates to faster filtration rates, drier solids, less filter aid consumption and a smaller footprint (less square footage needed).ĪLAR engineered the Auto-Vac® with variable adjustments for more efficiency. The patented design features a non-segmented drum that allows 27' of vacuum to pull liquid through 100% of the filter surface. The systems are available in automatic (PLC and pneumatic control) or semiautomatic (switch and valve control) options. Contact ALAR to help determine the Auto-Vac® that best suits your application.ĪLAR custom builds sixteen (16) Auto-Vac® sizes ranging from 3.14 to 503 square feet of filtering area. The drum size, filtration rate, dryness of solids and filter aid consumption varies with the characteristics of the incoming liquid. The knife also shaves off a slight amount of filter aid cake as it advances toward the drum leaving a clean layer of media to grab more solids. At this point, a stepping motor activates a variable speed knife blade that removes the top layer of solids with lathe-like precision. These solids will build with each revolution of the drum until the vacuum cannot draw any more water through. Suspended solids, precipitated metals, or de-emulsified fat, oil and grease larger than one-micron will accumulate on the filter cake surface. The vacuum sucks the water through the drum and pumps it away. Once a full cake is built on the drum, the wastewater is pumped into the pan at a controlled rate. This consumable filter media is porous, allowing air and water to pass through while capturing micron size particles. When activated, and before filtration, the drum surface is coated with a filter aid 'cake' of Diatomaceous Earth (DE) or Perlite. The drum rotates in a trough where one-third is submerged in liquid and two-thirds are exposed to ambient air. The inside of the drum is hollow the outside consists of a wedge wire screen covered by a polypropylene cloth. An Auto-Vac® utilizes a liquid ring vacuum pump that pulls water through a precoat drum filter while sucking moisture out of the suspended solids.

Penjelasan tentang alat rotary vacum filter