Double Walled Tube Heat Exchangers
Spiral Plate Heat Exchangers
The Spiral Plate Heat Exchanger is actually a family of heat exchangers based on the basic Type A spiral core. A variety of spiral heat exchangers can be created by adding or taking away weld-seams and head arrangements. This versatility makes the spiral attractive to many services and applications.
Types of Elanco Spiral Heat Exchangers
Type A
Spiral in both circuits, removable heads on both sides for clean out. With a Type A, both fluids are in spiral flow and in true counter flow. Used for fouling flows on both sides where cleaning of the prime surface is required. Example: bottoms to feed interchanger.
Type B
Similar to Type A, both fluids are in spiral flow, true counter flow. Spiral in both circuits, removable head on one side and all welded on other side. Used when only one of the flows is fouling or when gasketing of one flow is a problem. Example: condensate cooler with river (muddy river water on cleanable side).
Type C
Spiral in both circuits, all welded on both sides, and once again both fluids are in spiral flow, true counter flow. Used when the flows are clean, when gasketing is problematic, or when cost must be kept to a minimum. Example: deionized water to tap water.
Type D
Spiral/axial circuit for boiling or condensing on one side or both sides. Could have both, one or none of the heads removable for cleaning. The boiling feed enters as liquid to the spiral from the periphery, and boils up axially. Vapors enter the center, condense down and exit the peripheral. With careful design, sub-cooling can be controlled. Example: sludge header with steam, or natural circulation reboiler for distillation.
