Filtration Systems

Glass grinding residue, "swarf"*, can wreak havoc on processing equipment, causing increased maintenance costs, unplanned downtime, decreased yields, and decreased equipment life. Not only does swarf cause wear of moving parts, it can settle throughout your processing water distribution system and over time completely clog pipes.

Swarf can be carried downstream, affecting other equipment and processes, such as washers, screen printing, etc. Suspended solids removal is a must.

Settling tanks may be used. Many of our Customers using vertical edging machines utilize small recirculation water tanks. The swarf will settle over time, but it is a slow and inefficient process; therefore these tanks typically need to be emptied daily. The manpower requirements for this should not be underestimated. Some customers have found payback to be within 6 months. In a larger installation, our DL275 unit was removing up to 240 pounds per hour.

Other filtration systems may be used, such as cartridge type filters, indexing paper, or a filter press. These systems, generally speaking, are more costly to purchase and operate, and generate additional labor costs and waste streams that can be greater than the solids alone.

Centrifugation is the efficient, cost-effective method to separate solids from liquids.

Centrifugation uses centrifugal force to cause the heavier solids to concentrate in a solid "cake" for easy removal, reclamation, reuse, or disposal. No filter media is required. Liquid containing particles of solids enters the centrifuge, via the feed inlet. The liquid is accelerated and dispersed by the centrifugal force generated by rotation of the rotor bowl. The force causes the solids to adhere to the inside wall of the bowl. The clarified liquid is discharged through the clean liquid outlet port to a clean liquid tank for reuse. As the slurry is processed, solids build up on the inside wall of the rotor, or bowl, to the point that cleaning the bowl is required.

Centrifugation also aids in the control of bacteria. The centrifugal force actually breaks down many bacteria. The result is decreased bacterial count and reduced odor and other problems that may usually be associated with higher bacterial counts found in settling systems.

Glassline's Automatic Discharge Centrifuges feature VARIABLE GRAVITY FORCE leading the field in centrifuge technology. Our patented "Load Sensing" capability automatically triggers and actuates solids discharge. Automatic reversing of the solids evacuation blades ensures complete waste removal in the most difficult and dense solids conditions. Our bottomless cabinet design allows for easy cleanup and waste removal. The inverted bowl design places the bearings and drive mechanisms at the top of the machine, preventing processing fluids from entering these components. On "XL" models, processing parameters can be modified via an operator screen connected to a PLC, allowing for total flexibility in adjusting the processing parameters to the material and flow requirements and improve system efficiency.

Our Manual Discharge Centrifuges are made for smaller installations or systems and come with a removable Buna liner which is easily inverted for manual dumping and cleaning.

The processing equipment can work with a centrifuge in a "Side-Stream" dialysis type process, or by "Batch" processing. Solids may be extracted from process fluids on one machine, or on many machines. Depending on the size of the system, the processing liquid will need an appropriately sized holding tank or pit. Various Tank Systems are available, but a system can be customized to suit our Customers' needs, and many options are available, such as automatic make-up water and dosing systems.

Glassline has placed hundreds of centrifuges throughout the worldwide glass industry, not to mention in other markets, such as stone and ceramics, metal working, wire drawing, food processing, waste-water recovery, plating, etc.

 

*"swarf = Intimate mixture of grinding chips and fine particles of abrasive and bond resulting from a grinding operation."

 

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