For over 60 years, SCHMIDT’SCHE® Transfer Line Exchangers (TLEs) have set the standard in ethylene production, ensuring rapid quenching, maximum energy recovery, and superior process efficiency.
Based on our proven Double Tube & Oval Header technology platform, our TLEs deliver unmatched reliability and extended service life. By rapidly cooling cracked gas from 900 °C to 350 °C in milliseconds, they prevent secondary reactions, optimize ethylene yield, and generate high-pressure steam for enhanced energy efficiency.
Every SCHMIDT’SCHE® Transfer Line Exchanger (TLE) is a custom-engineered solution, designed to meet the highest performance and safety standards in ethylene production. While each unit is unique, the core DNA of the SCHMIDT’SCHE® TLE product family is defined by exceptional reliability, durability, and process efficiency.
At the heart of this innovation is our SCHMIDT’SCHE® Double Tube & Oval Header technology, which ensures optimized gas flow, minimized pressure drop, and enhanced thermal efficiency. This advanced design not only increases ethylene yield but also significantly reduces maintenance requirements through online decoking, eliminating the need for mechanical cleaning of furnace coils.
The optimized gas flow and low Coil Inlet Pressure (CIP) significantly enhance ethylene yield by reducing pressure losses and maximizing process efficiency.
With a unique oval header design, our TLE compensates for thermal expansion, reducing mechanical stress and protecting critical components. This extends the service life of the exchanger and improves reliability.
A self-regulating system with minimal water volume allows the TLE to quickly adapt to fluctuations in operating conditions, ensuring stable and efficient performance under varying loads.
By automatically adjusting heat distribution, each tube optimizes its cooling capacity based on process demands. This maximizes heat recovery and enhances overall efficiency.
A highly efficient heat transfer system prevents overheating and corrosion, safeguarding equipment and ensuring long-term operational stability.
Designed for both vertical upflow and downflow configurations, the TLE seamlessly integrates into various plant layouts, offering flexibility for different production setups.
Maintenance is streamlined through online decoking technology, which keeps the system clean without interrupting operations. If necessary, individual tubes can be replaced quickly and easily, minimizing downtime.
With over 60 years of expertise, SCHMIDTSCHE SCHACK continues to set the benchmark in TLE technology, ensuring higher yields, lower maintenance, and superior process efficiency. Contact us today to optimize your ethylene production.
SCHMIDT’SCHE® Round-Type Transfer Line Exchanger (TLE) – Compact and Efficient Heat Transfer
The SCHMIDT’SCHE® Round-Type Transfer Line Exchanger (TLE) is a high-performance solution offering efficient heat exchange and a compact design. Featuring Double Tube registers and oval headers, it optimizes space and performance. Typically, one to fourteen Round-Type TLEs are installed per furnace, with a single gas inlet connected to multiple furnace coils.
The gas inlet channel ensures uniform flow, minimizing adiabatic residence time, and preventing flow recirculation and coke formation for optimal heat transfer.
Your Benefit
The SCHMIDT’SCHE® Linear-Type Transfer Line Exchanger (TLE) is a trusted, high-performance solution with an impeccable reliability record, with over 1,800 units in operation since 1980, all without a single failure. These exchangers are closed-coupled to individual furnace radiant coil outlets, typically arranged in Double Tube register modules.
The inlet transition pieces gradually reduce the skin metal temperature from 900 °C (1,650 °F) to 320 °C (610 °F), preventing thermal stresses and ensuring trouble-free operation. The Oval Headers are connected directly to the riser and downcomer piping, with no tube sheets, minimizing the adiabatic zone for improved heat transfer efficiency.
Your Benefits
The SCHMIDT’SCHE® Quick Quencher TLE offers an ultra-fast residence time of 10 milliseconds, making it the fastest model in our portfolio. Co-developed with Lummus Technology, this Multi-Tube Exchanger features Double Tube registers, optimized for rapid quenching.
The Quick Quencher connects up to 12 TLE tubes to a single furnace coil, cooling process gas efficiently in just one heat exchanger. The aerodynamic ceramic insert ensures uniform gas flow and reduces coke formation.
Your Benefits
The SCHMIDT’SCHE® Bathtub Transfer Line Exchanger (TLE) features Double Tube registers welded together to form an oblong-shaped inlet, allowing for two or four gas inlet connections. The Oval Headers create a stepped arrangement that reduces inlet channel volume and enhances gas flow patterns, optimizing performance.
This unique design minimizes adiabatic residence time, improving olefin selectivity and enabling faster gas cooling. The Bathtub TLE allows for direct connection of multiple furnace coils, eliminating the need for Y-pieces.
Your Benefits
Complete your quench system with the SCHMIDT’SCHE® Secondary and Tertiary Transfer Line Exchanger (TLE). Fully customizable to meet your needs, our equipment ensures high safety and reliability.
The Secondary TLE cools the cracked gas, while the Tertiary TLE preheats the boiler feed water, acting as an economizer. Flexible tube sheets and crevice-free tube attachments reduce stress and prevent corrosion, extending equipment life.
Your Benefits
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Years of verified trouble-free operation
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Years of verified lifetime
