The phone that connects you to people far away. The laptop that accompanies you everywhere.
The car that takes you around the world… SCHMIDTSCHE SCHACK plays a part in all of these.
As a leading designer and manufacturer of process heat transfer solutions, we are a strong industry partner to the world’s foremost process licensors, engineering contractors, and plant operators in the chemical, petrochemical, and metallurgical industries, as well as in the refining sector and the future-oriented recycling industry. These industries rely on our concepts.
Our system solutions contribute to the production of more than 50% of all synthetic materials worldwide. This trust in our expertise makes us proud and stands as proof of the reliability, performance, and quality of our products and services.
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
The SCHMIDT’SCHE® Syngas Cooler is engineered to meet the demanding needs of gasification processes. Utilizing our proven Double Tube & Oval Header Technology, this cooler effectively handles harsh operating conditions and high abrasive dust loads common in coal and petcoke gasification applications.
Our Syngas Coolers combine the advantages of both fire tube and water tube designs, offering superior protection against tube inlet erosion and the formation of gas-side deposits. The innovative design eliminates the need for ferrules, ensuring long-term reliability and durability.
Each tube is equipped with its own cooling elements, allowing the system to self-adjust based on the individual heat load. This results in optimized heat recovery and improved process efficiency, even in the presence of uneven gas flow distribution.
With thin-walled oval headers, the cooler minimizes mechanical and thermal stresses, protecting the magnetite layer on the tubes and ensuring extended operational life. High cooling water flow velocities further enhance cooling efficiency and ensure the removal of particles that could damage the equipment.
Your Benefits
The SCHACK® Syngas Cooler is designed for high gas inlet temperatures, providing efficient heat recovery while preventing liquid or sticky slag particles from contacting the heat transfer surface. By generating high-pressure steam through heat transfer from the raw gas, it plays a critical role in gasification processes.
Available in membrane wall or double shell designs, the cooler is built to withstand extreme temperatures, improving process efficiency by up to 5% compared to direct water quenching systems. The integrated water bath and slag crusher safely reduce slag fragments to manageable sizes for downstream processing.
Your Benefits
The SCHACK® POX Syngas Cooler is engineered for partial oxidation (POX) reactors, handling extreme temperatures up to 1,5 °C and feedstocks rich in heavy metals. With our patented gas inlet nozzle design and superimposed cooling, it offers reliable protection against corrosion, erosion, and metal dusting.
Its self-cleaning tube geometry maintains heat transfer efficiency, while thin-walled surfaces ensure precise temperature control. Designed for easy access, the replaceable coils and interchangeable inlet tubes reduce maintenance time and increase system uptime.
Your Benefits
Our SCHMIDT’SCHE® and SCHACK® Reactors and Gasifiers are engineered for high-temperature applications such as partial oxidation (POX), reverse water gas shift (RWGS), and methane pyrolysis. Designed to process liquid, gaseous, or solid feedstocks at temperatures up to 1,60 °C and pressures up to 100 bar, they deliver efficient conversion and maximum process flexibility.
Depending on your process, we offer refractory-lined or membrane wall designs, supported by custom cooling concepts including radiant, convective, or direct quench systems. Our technologies are used in projects ranging from compact systems to the world’s largest-scale gasification plants.
By operating at elevated temperatures, our reactors enable faster reaction rates, higher yields, and improved process efficiency, while also allowing for the use of waste heat or renewable energy for greater sustainability.
The SCHACK® Forced Circulation Process Gas Cooler (PGC), also known as the La Mont Boiler, is designed for challenging nitric acid production environments. This water tube design ensures reliable operation while minimizing corrosion through optimized materials and a precise operating system.
The flat coil heating surface elements enable a compact single vessel design, while the control evaporator technology ensures constant gas outlet temperatures over the full load range. The low gas side pressure drop and low start-up steam requirements enhance efficiency, making this cooler highly reliable and cost-effective.
Additionally, the cooled support structure for the catalyst basket improves durability, while externally accessible headers and easy removal of heating surfaces simplify maintenance and reduce downtime.
Your Benefits
The SCHACK® Natural Circulation Process Gas Cooler (PGC), with its fire tube design, is built to handle high-temperature applications in nitric acid production. This design features parallel fire tube bundles arranged in the lower part of the cooler, acting as an evaporator, while tube coils in the upper section generate superheated steam.
With integrated flexible tube sheets, our Natural Circulation PGC reduces stress on the tubes and welds, leading to enhanced durability and extended service life. The gap-free welding technology effectively prevents crevice corrosion, ensuring reliable performance in even the harshest environments.
This design eliminates the need for circulation pumps, significantly improving system reliability and reducing operational costs. The patented tube sheet cooling system enhances cooling efficiency, while specially designed ferrules ensure the longest possible lifetime of the system.
The SCHACK® Combined Circulation Process Gas Cooler (PGC) truly has the best of two worlds: The combination of fire tube and water tube technology in one device combines the advantages of both designs with additional benefits.
Your Benefits
The SCHMIDT’SCHE® Process Gas Boiler (PGB) is a high-performance solution designed for efficient heat recovery and reliable operation in steam reforming applications. Featuring a flexible tube sheet design and advanced cooling technologies, it maximizes heat transfer while ensuring optimal protection for critical components. Typically, one or more PGBs are installed per furnace, integrated into the overall steam reforming process for optimal efficiency.
SCHMIDT’SCHE® Synloop Boiler are exposed to very high operating pressures, resulting in huge mass flow densities
and thermal heat fluxes.
The synthesis gas, consisting essentially of hydrogen, nitrogen and ammonia, is under pressures of 200 to 250 bar (2,901 to 3,626 PSI). In the waste heat boiler, the synthesis gas is cooled down from approx. 450 °C (842 °F) to approx. 340 °C (644 °F) whereby high pressure saturated steam of about 120 to 140 bar (1,740 to 2,013 PSI) is produced.
SCHMIDTSCHE SCHACK’s competence in engineering and highly qualified manufacturing guarantees the required high quality of the synloop boiler.
Your Benefits
The SCHACK® FGTT Air Preheater Type ‘Recuperator’, incorporates a design whereby hot flue gas flows through the tubes (FGTT) with preheat air flowing over the tubes in multiple cross-counterflow passes. The FGTT tube bundle is an all welded construction, with refractory lined casing.
The high velocity dirty gas flow within the tubes is parallel to (rather than normal to) the heat transfer surface. This eliminates erosive impingement, which would limit life. Additionally, the combination of vertical tubes plus high velocity flue gas flow results in a self-cleaning design. Schack recuperators in this service have lasted as long as 20+ years without tube replacement.
The FGTT construction has wide acceptance in dirty gas environments, with hundreds of ‚Schack‘ recuperators in service worldwide for fluid bed incinerators alone.
Every stack that exhausts hot flue gases to the atmosphere represents irretrievable thermal energy. If recovered as useful heat, it directly translates into savings in total energy costs and possibly reduced capital costs.
The SCHACK® Green Boiler is designed to handle the most difficult industrial applications. Heavy particulate / ash flow can be accepted without erosion to pressure parts. Corrosive environments can be managed with intelligent design and proper selection of construction materials. This SCHACK® design has wide acceptance in a variety of dirty gas applications.
With 50+ years of experience in sludge incineration, our Green Boiler will withstand this severe environment, avoiding premature failure of the equipment. The membrane wall technology ensures consistent temperatures throughout the entire boiler – maintaining uniform thermal growth between the evaporator and membrane walls. Our modular design maximizes shop fabrication, minimizing costly field erection & assembly work.
In applications where super-autogenous combustion is expected, SCHACK® in-bed coils and over-bed coils can be used to reduce bed temperatures, minimizing the need for freeboard water sprays or increased excess air.
Our in-bed coils are typically designed to be rotatable, prolonging their expected operating life and reducing required maintenance. In-bed coils can be used as the sole steam generation source, or as an enhancement to external steam generation, working with external superheater and economizer surfaces.
Your Benefits:
The SCHACK® Thermal Oil Heater can be used in sludge incineration processes for auxiliary building heat or to act as the heating source for dryers as well as for an Organic Rankine Cycle (ORC). These units can either be serpentine tube or fire tube designs.
The serpentine design boilers are fitted with online cleaning devices, while the fire tube versions act as a self-cleaning design. When the Thermal Oil Heater is designed as part of an ORC and combined with a turbine, the heated oil converts the thermal energy to electricity. ORC’s can be an attractive alternative, particularly because their operating pressures are lower and operating costs can be reduced.
Your Benefits:
The SCHACK® Air Preheater is engineered to withstand the extreme conditions of carbon black production, including high process temperatures, corrosive gas compositions, and particle-laden flows. Designed on the “flue gas through the tubes” principle, it efficiently recovers heat from process gas to preheat reaction air — a key factor in yield quality and plant economics.
With a proven design legacy dating back to 1957, today’s SCHACK® Air Preheater achieves air preheating temperatures up to 950 °C, setting a global benchmark in carbon black technology. Its baffle-guided shell-side flow ensures uniform heat transfer and process stability.
By enhancing thermal efficiency, supporting particle definition, and enabling steam generation from recovered energy, the SCHACK® Air Preheater is a critical component for maximizing output, product quality, and overall profitability in modern carbon black plants.
Your Benefits
SCHACK® Quench Boilers are positioned within the carbon black process directly downstream of the reactor in which the quench process takes place. The main function of quench boilers is to generate high-pressure steam by cooling down process gas, for example from 1,400 °C to 1,000 °C (2,552 °F to 1,832 °F).
The cooling temperature window is adjusted to the inlet temperature of the air preheater connected downstream.
SCHACK® Quench Boiler design is based on the approved SCHMIDT’SCHE® Double Tube & Oval Header technology platform for extremely high thermal loads.
The heat recovered from the carbon black gas is used by the SCHACK® Quench Boiler to generate saturated steam.
The SCHACK® Quench Boiler is not sensitive to fouling particles and exhibits high mechanical reliability.
Your Benefits
