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Proven, Trusted Solutions™ Durco Filters - Your Chemical Filtration Partner
“We at ASCENSION INDUSTRIES take pride and satisfaction in continuing the 130+ years of DURCO/ENZINGER quality, workmanship, innovation, and traditions. “PROVEN, TRUSTED SOLUTIONS” is more than a legacy, it is the commitment and motivation we live by and eagerly share with our customers.”
- Jack Kopczynski, President
Durco Filters filtration systems are used worldwide in the most demanding chemical applications. Our strength is in combining our innovative technology with over 130 years of chemical industry experience to provide economical and effective filtration systems.
Durco Filters systems have long enjoyed a place in the chemical process market. This sector is one of the largest in the world. When you choose us for your chemical process application, you are in good company. Here are some of our chemical customers:
AkzoNobel
BASF
Celanese
Dow Chemical
DuPont
Exxon Mobil
Formosa Plastics
Honeywell
Huntsman Corp.
Johnson Matthey
Mitsubishi Chemical
Momentive
PPG Industries
Procter & Gamble
Rockwood Holdings
Shell
Filter Press for Hydroxide and Paint Sludge Dewatering
Amine Filtration Pressure Leaf System Brine Filtration for Chlorine Production Pressure Leaf System
Amine Tubular Backwashing System
Phone: +1.716.693.9381www.durcofilters.com
Durco Filters, and Proven, Trusted Solutions are trademarks of Ascension Industries, Inc.
Chemical Plant
2
Durco Filters - Your Chemical Filtration Partner
Permanent media
Sub-micron retention
Proven in thousands of aggressive and harsh chemical installations over decades of use
Best clarification to improve production yields
Lowest operation cost
Efficient, safe, and easy to use
Brine polishing, water, amine, hydroxide, and a host of other chemical applications
Various configurations to meet your installation and application needs
Pressure Leaf Filters
Maximum durability for harsh environments and applications
Configurations to meet your needs economically
Best method to result in higher product purity and driest cake
Improve following operations by removing contaminants
Used in recovering precipitated sludge and product
Filter press life up to 25+ years
Filter Presses
Permanent media/low maintenance/clean in place
Completely automated
Protects nozzles, RO systems, heat exchangers, and other process equipment systems
Tubular Filters
Major Chemical Company Pressure Leaf Installation
Tubular Backwashing Filter and Filter Press System in Automotive/Truck Facility
For Organic Chemical Applications (i.e. PTMEG, POM and Other Chemical Applications)
Phone: +1.716.693.9381www.durcofilters.com
Durco Filters, and Proven, Trusted Solutions are trademarks of Ascension Industries, Inc.3
Proven - Expertise in Chemical Filtration Durco Filters - Your Chemical Filtration Partner
Molten Sulfur and Sulfuric Acid Filtration Chlor-Alkali ProcessChlorine-Caustic-Hydrogen
ChallengeDuring storage and handling, sulfur becomes contaminated with solids such as dirt and ash. Lime is added for neutralization. These contaminants quickly plug sulfur burners, SO2 gas filters and catalyst beds.
SolutionOur specially designed pressure leaf filters greatly reduce the maintenance costs in molten sulfur processing: burner cleaning is reduced, shutdowns are minimized, and SO2 gas filters can be eliminated.
Applications: Molten sulfur, amine gas, off-gas from sour water stripper, Claus process, cleaning waste gases containing sulfur compounds, final absorbing tower (FAT), sulfide ores, SNOX flue gas, metallic sulfates, and other sulfur containing materials.
Phone: +1.716.693.9381www.durcofilters.com
Durco Filters, and Proven, Trusted Solutions are trademarks of Ascension Industries, Inc.
Sulfur
Sulfur Melter
Dirty Sulfur Pit
Pressure Leaf Filter Pressure Leaf Filter
Precoat Tank
Storage Tank
Sulfur Burner
Steam
SO
²
SO³
Catalyst ConverterH²SO4 Injection
Absorber
Storage Tank
Pressure Leaf Filter
Dirty H²SO4
Storage Tank
Clean H²SO4
Drycake Discharge
Tubular Filter Tubular Filter
OROR
Tubular Filter
Drycake Discharge
Features
Overhead Frame
Quick Open Closure (QOC)
Optimum Leaf Spacing
Proprietary Leaf Construction
Full Steam Jacket
Eliminates sulfur deposits on the shell retraction rails and protects shell retraction mechanism
Fast access to the internals during cake discharge
Allows large cakes to be built; permits easy cleaning and prevents damage to leaf nest by discouraging bridging
Exclusive welded leaf construction provides higher throughput and greater strength
Maintains process temperature throughout the vessel - even extending to the nozzle area to prevent cooling
Benefits
Typical Molten Sulfur Pressure Leaf Filter
4
Durco Filters - Your Chemical Filtration Partner
Molten Sulfur and Sulfuric Acid Filtration Chlor-Alkali ProcessChlorine-Caustic-Hydrogen
Phone: +1.716.693.9381www.durcofilters.com
Durco Filters, and Proven, Trusted Solutions are trademarks of Ascension Industries, Inc.
Membrane Process Diaphragm ProcessDissolving and Precipitation
H²ONaCl
Na²CO³NaOH
Pressure Leaf Filter
(Brine Filtration)
ElectrolysisCell
Membrane
H²Gas
Cl²Gas
Electricity
Dechlorination
NaOH
Concentrator
Filter Press
50% NaOH
H²O
Electricity
Brine Saturator
Pressure Leaf Filter
(Brine Filtration)
Precipitation
Filter Press
Heat Exchanger
Heat Exchanger
H²ONaCl
Cl²Gas
Brine Saturator
NaCl
ElectrolysisCell
Diaphragm
H²
H²
Concentrator
NaCl
50% NaOH
2NaCl + 2H²O Cl² + H² + 2NaOH
Aggressive acids, bases and solvents
Catalyst removal
Organic chemicals: polyolefins, polyamids (nylon), PTMEG, POM, carbon fine removal, styrene
Amines and glycols
Biofuels and vegetable oils
Alcohols and fabric coatings
Propellant/explosives
Chemical Filtration ApplicationsResins, polymers and adhesives
Agricultural chemicals and fertilizers
Photo processing chemicals
Soaps and waxes
Paints and coatings
Herbicides and pesticides
Inks, pigments and colors
Fire chemicals
Ammonia and detergents
Brine and metal salts
Tanker filling/filtration
Lubricants and unloading oils
Rubber and latex
Machining fluids
Fly ash scrubber sludge
Clays and titanium dioxide
Filter Press at Major Chemical Plant U.S. Location for Metal Hydroxide Filtration
5
Durco Filters - Your Chemical Filtration PartnerTrusted Solutions - for Chemical Applications
Fluorocarbon-Lined Tubular Filters for Strong Acid Filtration
Features:Multiplex Design - Multiple-filter, continuous filtration systems rated for use to 200°F (93°C) at 150 psi (1034 kPa)
Robust Housings - ANSI 150# carbon steel or stainless steel (with corrosion resistant exterior coating), lined with fluorocarbon for extreme corrosion resistance
Permanent Filter Media - Reusable corrosion-resistant to eliminate cost & handling of disposable media and avoid operator contact with hazardous materials
Host of Retention Options - Filter particulates to 1 micron
Fluorocarbon-Lined Valves and Manifolds - For durability & reliability, with optional polypropylene-lined or solid FRP manifolds
Automation - Available with a fully-automatic backwashing system; continuous multi-filter systems enable operator-free filtration
Sub-micron particle retention
High flow rates
Durco filters exclusive dual DuraSluice™ system for efficient media cleaning, and wet cake discharge without opening the vessel
ASME, NACE, HAC and AICHE standards for the strictest specifications
High temperature & pressure design
Constant flow batch operation allows multiple day cycle times
Skidded modular piping reduces installation time and cost
Stress-relieved, post-weld heat treated piping when required
Closed system limits personnel exposure to H²S and amines
Side-stream or full-stream filtration
Our Pressure Leaf Filters Offer:
Phone: +1.716.693.9381www.durcofilters.com
Durco Filters, and Proven, Trusted Solutions are trademarks of Ascension Industries, Inc.6
Durco Filters - Your Chemical Filtration Partner
Product Overview
Fluorocarbon-Lined Tubular Filters for Strong Acid Filtration
Pressure Leaf Filter
Typical Applications: Mining, Molten Sulfur, Specialty Chemical, Biofuel, Amine, Pharmaceuticals, Chlor-Alkali, Brewery and Winery, Edible Oils, Sugar, Juice
Pressure Nutsche
Typical Applications: Pharmaceuticals, Specialty Chemicals, Pilot Studies, Small Batch Products
Tubular Backwashing Filter
Typical Applications: Pulp and Paper, Water, Amine, Specialty Chemical, Mining, Cooling Tower, Petrochemical, Food & Beverage, Corn Syrup, RO Protection
Filter Press
Typical Applications: Mining, Chemical, Industrial Waste Water, Pigments, Salt Precipitation, Environmental
Sludge Dryer
Typical Applications: Inorganic Metal Hydroxide, Uranium Drying, Hazardous Waste
Complete Process Solutions
Ascension Industries offers a full range of capabilities from design to turnkey manufacturing with extensive experience in skid-mounted process systems, machine assemblies, and more.
Phone: +1.716.693.9381www.durcofilters.com
Durco Filters, and Proven, Trusted Solutions are trademarks of Ascension Industries, Inc.7
Publication: A.22.C.202/2013
10,000
1,000
100
10
LOG GPM
LOG LPM
LOG PPMLOG % SOLIDS
101 100 1,000 10,0001% 10% 100%
38,000
3,800
380
38
10 100 1,000 10,0001% 10% 100%
SludgeDryers
Filter Presses
Pressure Leaf Filters
Tubular Filters
Pressure Nutsches
Tubular Filters - For applications <220 ppm for biological solids, upwards of 525 ppm for granular solids, high flow rates
Pressure Leaf Filters - Up to 3% solids for easily filtered materials
Pressure Nutsches - Great for piloting, specialty applications, and when the ability to interrupt flow is desired
Filter Presses - For dewatering slurries
Sludge Dryers - Typically used in conjunction with filter presses, reduces cake weight, and volume
Lab Testing
Durco Filters Application Engineers test customer samples to help ensure that our equipment meets the needs of your application. Our lab will determine the optimum set of equipment parameters for each application including: equipment type, sizing, filter media, flow rates, and filter aid requirements.
Parts
We also carry and manufacture a complete line of Durco Filters spare and replacement parts for all of our filtration systems and products. We stock many parts and can provide 24-hour delivery in emergency situations. Please inquire about:
Pressure leaf filter leaves
Tubular filter bags, and screens
O-rings, gaskets, and filter elements
Sluicers, valves, and controls
Filter press plates and cloths
Pilot Testing
For new or difficult applications, pilot testing on or off-site is recommended. Durco Filters pilot test units confirm feed rates, filter media, filter aids, and other filtration factors supporting optimal operation.
Field Service
Durco Filters Field Service travels the world to keep filtration systems performing at peak efficiency. Services offered include:
System startup
Customer training
Preventive and maintenance contracts
Installation supervision
Emergency repair and service
Equipment upgrades and refurbishments
Applications & Services
1254 Erie AvenueNorth Tonawanda, NY 14120
Phone: +1.716.693.9381Fax: +1.716.564.9044
Continuing the tradition of over 130 years of Durco Filters™ quality and innovation, as well as custom turnkey systems, Ascension Industries is your provider of Proven, Trusted Solutions.
ASME Section VIII, China Code (SQL-AQSIQ), European– PED (97/23/EC) | ISO9001:2008
Proven, Trusted Solutions™
Durco Filters, and Proven, Trusted Solutions are trademarks of Ascension Industries, Inc.