Alfa Laval Packinox design is the largest type of plate heat exchanger currently available anywhere in the world. The heat recovery duties for which Alfa Laval Packinox heat exchangers are used normally involve very long temperature programs – normally at several hundred degrees Centigrade – with only a small temperature difference between the flow fluids. Highly efficient heat exchangers with very large heat transfer areas are needed to handle such duties.
Alfa Laval Packinox design consists of large explosion-formed metal plates, welded into a plate pack that is then inserted into an even larger pressure vessel. This unique configuration combines the exceptional thermal and hydraulic efficiency of modern plate heat exchanger technology with the traditional advantages of shell-and-tube units under high temperatures and high pressures.
The result is extremely efficient heat recovery within a compact structure that can deal with very large throughputs. Such compactness also means major savings in infrastructure and installation costs, while the improved heat recovery efficiency results in greatly reduced energy and emission costs.
Prime uses for Alfa Laval Packinox heat exchangers include the recovery of heat from feed/effluent flows in processes such as catalytic reforming, diesel or naphtha hydrotreating and paraxylene or toluene production. The popularity of this design in refineries and petrochemical plants reflects companies’ need to optimize key processes when operating in markets characterized by growing demand and high energy prices, as well as a focus on energy recovery and reduced emissions.
Alfa Laval DuroShell is a specially engineered plate-and-shell heat exchanger ideal for demanding duties, such as high pressure, high temperature and corrosive applications. Incorporating many innovative features to optimize customers’ process performance, it takes the plate-and-shell concept to a new level.
With its exceptional thermal performance and fatigue resistance, the compact-sized Alfa Laval DuroShell plate-and-shell heat exchanger opens up a whole new world of possibilities. Designed for use with liquids, gases and two-phase mixtures at pressures up to 100 bar (1450 psi), in both PED and ASME, and at temperatures up to 450°C (842°F), Alfa Laval DuroShell is suitable for a wide range of aggressive media.
Alfa Laval Ziepack compact in-column condensers, stab-in reboilers and gas-gas heat exchangers are designed for high condensation or evaporation duties, primarily in the petrochemical industry.
The construction of Ziepack plate bundles combines plate and welding technology with “hydroforming”, the use of high pressure water to shape plates. “Doubleplate channels” for the process cooling or heating medium are hydroformed between the welds of two laserwelded stainless steel plates.
Process fluid boils or condenses in “interplate channels”, i.e. the passages between two sets of doubleplate channels. Their unique design makes Ziepack heat exchangers ideal where low pressure drop and compactness are essential, particularly in vacuum distillation columns. For revamps, Ziepack presents the added advantages of fitting available column space and accommodating existing equipment.
Alfa Laval DuroCore high-pressure offshore gas compression cooler combines efficient heat transfer and superior reliability with small footprint.With Alfa Laval DuroCore high-pressure compression cooler we take the plate-and-shell heat exchanger category to a higher performance and more service friendly level.
Alfa Laval DuroCore combines the thermal efficiency of our plate heat exchangers with the robustness and reliability of conventional shell-and-tube heat exchangers. In a much smaller footprint than a corresponding shell-and-tube, it can handle pressures up to 250 bar (3650 psi) and temperatures from -46°C (-51°F) to 200°C (392°F), making it ideal for demanding offshore installations where space always is a premium.