Pulp and Paper Mills

Graver Technologies provides filtration solutions to optimize the quality, productivity, and economics for paper mills.

Filtration Technology to Protect Pulp And Paper Mill Processes

Filtration is an essential part of the manufacturing process for the pulp and paper industry, who requires innovative technologies to ensure product quality, consistency, and affordability. Protection of equipment such as valves and pumps and managing incoming raw water quality or bleaching chemicals and additives is critical to minimizing downtime, reducing the cost of maintenance, and assuring high productivity levels. Whether it is cooling water filtration, process water filtration, spray nozzles protection, pump seal protection, or RO prefiltration, Graver Technologies provides a filtration solution to allow manufacturers to meet the quality, productivity, and economics of their process.

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Graver Technologies' Products For Pulp And Paper Mills

Remove particulate and silt from incoming water
Prevent contaminants from eroding the seals of rotating equipment such as pumps and refiners
Protect spray nozzles and sensitive instrumentation
Particle removal from chemicals, pigments and other additives
Prefilters to RO membranes

Product Selection

Application	Recommended Filter
Sulfuric Acid	Stratum A or Stratum C 10 to 30 microns
Sodium Chlorate	Stratum A or Stratum C 10 to 30 microns
Methanol	Stratum A 1 micron
Water
Incoming Water	MBF Series 5 micron
Water Knives	Stratum C 10 micron for ambient or RTEC G 10 micron for hot water
Spray Nozzles	Stratum C 10 to 50 microns
Eyewash Stations	MBF Series 1 micron
Seal Flush	Stratum C 20 to 50 microns
Paper Additives	Coax up to 100 micron
Pigments	Stratum A 10 to 20 micron
Dyes	Stratum A 10 to 20 micron
Latex	Stratum C or RTEC P 50 micron

Frequenty Asked Questions

How often should gas turbine filters be replaced?

This depends on the environment and filter type; however, pre-filters are changed every 3–6 months, while final filters may bechanged once in a year or two. Monitoring pressure drop is key to determiningreplacement timing.

What factors affect the operating life of a gas turbine filter?

Here are some factors:

Ambient dustand pollution levels
Operatinghours and load
Pulse-cleaningfrequency, depending on the type
Humidity andmoisture
Filter mediaand design

How do I know when a filter needs to be changed?

Differential pressure across the filter is animportant aspect in this case. If it increases beyond the set threshold, thefilter may be clogged or need cleaning or replacement.

What is pressure drop and why does it matter?

Pressure drop is the resistance to airflow through afilter. A high-pressure drop reduces turbine efficiency and increases energycosts. Selecting low-resistance filters helps improve performance.