High-Pressure Steam Generators
NUK® High-Pressure Steam Generator
The NUK ® produces non-toxic process heat while offering the same advantages of a conventional hot oil system.
The NUK® High-Pressure Steam Generator is a closed looped (hermetically sealed) system that produces steam for high-temperature applications.
Sigma Thermal developed the NUK ® specifically for the application of oil deodorization, typically used within the food industry. During deodorization, the NUK is used as a heat source in the process to safely remove undesirable flavors and odors from edible oils; leaving the oil free from toxins.
The hermetically closed-looped system consists primarily of a vertical cylindrical combustion chamber, coil, burner and supply and return manifolds.
Chamber walls are lined with vertical pipes with continuously-welded longitudinal fins. The pipes are connected to a lower manifold (fed with condensate) and upper manifold (connected to the steam outlet).
Often designed to section VIII Division 1, the heater remains flooded with fluid through the systems level control. This eliminates the need for boiler operation.
|Low NOx Options||
- Low NOx Emissions (w/optional equipment)
- High efficiency
- Non-Toxic Heat Media
- Fuel Versatility
- Natural Circulation (No Pumps Required)
- No feed water system
- Minimal Maintenance
- Designed & Built to ASME code
There are many reasons why the NUK “closed-looped” design is more beneficial than the conventional “open” boiler design.
"Open" vs. "Closed-Looped" Design
|Conventional “Open” Boiler Design||
|Nuk® “Closed-Looped“ Design||
All systems include burner management systems, single loop controllers, and limit controllers to comply with NFPA requirements. The control system is designed to provide a pre-purge and post-purge of the heater, automatic ignition, low flame start (high turn down burner), continuous main flame detected by UV sensor.
Control options are virtually limitless with relay logic and programmable logic systems available. User interfaces can be as simple as indicators and push buttons or as advanced as PC-based controls.
Standard relay logic based control panels are used on all equipment to provide a cost effective control system. They are relatively simple and reliable and provide adequate communication to the customers’ control systems (DCS).
Sigma Thermal Heaters are available with any of the following auxiliary equipment can be provided separately or designed into an integral skid, size and transportation requirements permitting.
- Combustion Air Preheaters
Sigma Thermal Energy packaged systems are skid mounted, wired, and assembled to the maximum possible extent before shipment to reduce installation time and labor. Packaged systems undergo a Functional Acceptance Test (FAT) which tests the proper operation of the burner management system, controls, instrumentation, and valves. This ensures that a Sigma Thermal Energy system will be ready for a quick and easy start up as soon as it arrives to the job site.