Pulp & Paper
Screening Solutions
Reliable screening for intakes, process water recycling and wastewater treatment that serve the pulp and paper industry
Optimized water management for sustainable profitability
Water plays an essential role in the pulp and paper industry. A plant’s productivity and profitability have a direct correlation to its water usage and associated treatment costs. Duperon liquid/solids separation technologies help pulp and paper operations run smoothly and optimize water use.
- Since water is required for almost every part of the manufacturing process, it is critical that production has uninterrupted flow.
- As water is drawn from an intake (or recycled) it must be free of debris to avoid damaging downstream equipment and processes. Simple, reliable screening at the intake eliminates blinding and captures harmful debris ensuring consistent water supply for production.
- To reduce costs and their environmental impact, many pulp and paper facilities recycle their process water. To successfully do this, contaminants that were introduced in the manufacturing process must be removed before process water can be reused. Screens designed to efficiently separate liquid and solids increase plant productivity and maximize water reuse, providing a significant cost savings.
- Additionally, screening can recover pulp and fiber, increasing profitability by recovering valuable material from the waste stream and reducing disposal costs.
- Screening improves the efficiency of biological and chemical wastewater treatment processes that are often required to meet regulations, discharge permits and maintain environmental compliance.
- All of which allows you to focus your team and resources on production rather than treatment.
Duperon offers solutions for pump protection at intake screens, solids removal for process water reuse, and preliminary treatment for onsite wastewater for the pulp and paper industry. The simplicity of Duperon’s equipment translates into reliability, eliminating downtime, minimal maintenance, all while helping meet discharge compliance.
Applications
Duperon screens are designed to be simple and durable in order to perform in a variety of conditions. Materials of construction are selected to maximize the life of the equipment in extreme temperature and PH levels. Our simple designs can be applied to solve high organic loading, batch processing, and a wide range of flow conditions without significant manpower requirements in the following applications:
- Pulp and paper processing
- Particle board
- Paper recycling
- Milling
- Paper packaging
Solutions to address the following:
Duperon application engineers have listening down to a science. We will work with you to achieve your specific process goals, while bringing decades of liquid/solids separation experience to the conversation. Duperon screens can be used to solve a variety of pulp and paper processing to address the following:
- Coarse screening
- Intake screens
- Fine screening
- Preliminary wastewater treatment
- Resource recovery screens
- In-channel screening
- Piped-in screening
- Packaged screening solutions
- Pump protection
- Drum screens
- Conveyance
- Disinfection prescreening (Ozone, chlorine, UV, etc)
- Clarifier prescreening
- Aeration/settling pond prescreening
The Duperon®
Difference
Simple
With few parts and minimal maintenance, Duperon equipment is easy to install, own and operate by crew
Reduce treatment costs
Duperon screens optimize solids removal that lower BOD, COD, the amount of treatment chemicals needed and debris loading of downstream processes
Reliable
Designed to maintain critical operations without downtime
Low maintenance
Allows primary focus to remain on revenue-generating activities
Increased profitability
Recovering pulp and fiber for increased profitably that would otherwise be lost revenue and incur expenses for disposal
Responsive service
‘You’ll like working with us!’ is not just a slogan at Duperon, it’s a way of operating to deliver extraordinary customer care during your planned maintenance cycles and with strategic inventory agreements
Coarse Screening
Bar openings greater than ½ in
Used for pump protection in raw water intakes
Fine Screening
Openings ½ in down to 0.020 in
Solids removal prior to process water recycling
Solids removal prior to clarification, aeration, and/or disinfection treatment
Solids recovery
Debris Management
Collection and Conveyance
Processing and transport of collected screenings for disposal
Screening and Solids Handling Products
Screening and debris management products for industrial applications are designed to work continuously, reliably, and efficiently. A simple and effective design reduces maintenance and costs, keeping your operating expenses low.
Duperon® Conveyance
Alternate to discharging onto the deck by application. Mechanical transportation and processing of captured debris.
Duperon® FlexRake IQ®
⅛ in – 4 in bar openings
In-channel fine or coarse, slotted bar screen with re-imagined FlexLink™ and Thru-Bar™ technology. Smart Raking™ enhancements and Smart LogIQ™ Sequence of Operations.
Duperon® FlexRake® FP
Bar openings greater than ½ in
In-channel coarse, slotted bar screen with FlexLink™ and UHMW Thru-Bar™ technology. Ideal for ‘sticky’ or matting debris. SSTL construction.
Duperon® FlexRake® FPFS
¼ in – ½ in bar openings
Fine, slotted bar screen with FlexLink™ and SSTL Thru-Bar™ technology. Ideal for ‘sticky’ or matting debris. SSTL construction.
Duperon® FlexRake® FRHD
2 in – 4 in bar openings
In-channel coarse, slotted bar screen with serrated UHMW scrapers and FlexLink™ Jam Evasion™ technology. SSTL construction used for wastewater.
Duperon® FlexRake® FS
0.020 in – ⅛ in bar openings
In-channel wedgewire screen. FlexLink™ Jam Evasion™ technology. SSTL construction.
Duperon® Internally Fed Drum Screen
Wedge wire, perforated plate, and wire mesh. Available in various opening sizes and as individual screen panels or single-screen wrap. The design eliminates trunnion wheels, sprockets, and chains, which reduces the wear and tear points and increases the product’s lifespan.
Duperon® Sluice
Conveyance of captured debris using trough, water and gravity.
Products quick guide
| Product Name | Screen Type | Bar Opening | Bar Type | Engineering |
|---|---|---|---|---|
| FlexRake® Fine Screen | Fine | 0.020 in to ⅛ in | Wedgewire, SSTL | Site Specific |
| FlexRake® IQ | Coarse & Fine | ⅛ in to 4 in | Slotted Bar, SSTL | Site Specific |
| FlexRake® Full Penetration Fine Screen | Fine | ¼ in to ½ in | Slotted Bar, SSTL | Site Specific |
| FlexRake® Full Penetration | Coarse | Greater than ½ in | Slotted Bar, SSTL | Site Specific |
| Package Screening System | Coarse & Fine | 0.020 to 2 in | Slotted Bar or wedgewire, SSTL | Site Specific |
| FlexRake® Heavy Duty | Coarse | 2 in – 4 in | Slotted Bar, A36 Steel, coated for intake. SSTL in wastewater | Site Specific |
Tell us about your project
Do you have a liquid/solids separation challenge in your collection system? We are here to help solve it.
Design Collaboration
To build your solution, our engineers take the time to understand your facility, process, and goals.
We’ll combine our team’s experience with water screening, cleaning, and processing with your team’s detailed understanding of your product and process, so we can develop a reliable and cost-effective solution.