The case for engineered solutions: Decreasing steam consumption while Increasing machine production, Jorge Trujillo - Product Manager, Paper Industry, Deublin Company Lisa Freed - Manager, Steam and Condensate Systems, Deublin Company - Paper Technology International 2025 FlipBook - Journal - Page 118

The case for engineered solutions: Decreasing steam consumption while Increasing machine production, Jorge Trujillo - Product Manager, Paper Industry, Deublin Company Lisa Freed - Manager, Steam and Condensate Systems, Deublin Company

PAPERTECHNOLOGYINTERNATIONAL
Figure 1: Dryer section featuring newly installed condensate outlet unions.
If flooding occurs, Deublin Blow-Thru Control automatically
increases drainage. As condensate restricts flow through the
syphon, the system increases DP to restore flow. It then reduces DP
as conditions stabilize. This is done quickly and automatically in the
machine DCS without the need for custom programming or operator
input.
Deublin Blow-Thru Control automatically adjusts blowthrough flow by varying Dryer Section DP as condensing loads
change. Blow-Thru Control utilizes an algorithm that allows
machines to run automatically without any operator intervention and
without the need to install specialized management equipment.
Deublin relies on specially designed radial separators with
rugged internal baffling, achieving very high separation efficiency.
Effective condensate separation is critical to thermocompressor and
Blow-Thru performance. Older separators often allow condensate
carryover, leading to flooding, uneven drying, and equipment wear.
Deublin’s skid-mounted separator stations include proprietary
improvements and offer superior reliability.
Deublin designs thermocompressors using in-house
software and partners with trusted manufacturers for fabrication of
its proprietary designs. Sizing errors are a thing of the past ensuring
efficiency across a wide range of performance requirements.
Deublin Blow-Thru Control prevents steam loss to the
condenser during both run and break, and allow pressure control
down to 0.0 psi (or lower in special cases). Steam consumption is
typically reduced to 1.2 kg per kg of water evaporated. All steam
sections use identical control scales, requiring minimal operator
input. High blow-through rates maximize drying capacity while
reducing downtime and maintenance. Deublin’s Blow-Thru Control is
distinct from conventional Flow Controls. In contrast, traditional DP
controls maintain a fixed pressure differential, regardless of drainage
effectiveness. Every Deublin system is pre-tested virtually across all
operating conditions.
Figure 2: Jorge Trujillo, of Deublin Company,
performing an internal dryer inspection.
Complementary Technologies: Radial Separators &
Thermocompressor Design
Deublin’s system is not built on Blow-Thru Control alone.
The company also pioneered several other enabling technologies:
1. Radial Separators: These proprietary components are
essential for high-efficiency steam separation, which
supports optimal dryer performance and steam usage.
2. Thermocompressor Design Tools: Deublin developed
in-house software for designing and sizing
thermocompressors with precision, enabling efficient
operation across a broad performance range.
Why Blow-Thru Control Systems Prevail
Despite early limitations in the industry, Deublin’s modern
thermocompressor systems are now superior to the best cascade
systems on every front.
Operational Simplicity: Operators do not need to interact
with the system beyond setting section pressures or selecting preset grade pro昀椀les. The drainage and DP control are fully automatic.
Modular Section Control: Steam sections are aligned with
drive sections, allowing any part of the system to be independently
shut down for maintenance without affecting the rest.
Wider Pressure Range: Systems can operate at any
pressure without dumping steam or compromising performance.
Robust Reliability: All mechanical components including
thermocompressors, valves, and pumps operate well within design
limits, even under abnormal conditions.
In-House Maintenance Capability: Since systems use
conventional controls and components, mills can perform
maintenance without relying on outside service providers.
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