Heating or cooling of particle-laden or viscous fluids is a difficult duty for most types of heat exchangers. Spiral heat exchangers with their compact, single channel design are ideally suited for outstanding thermal and uptime performance in these duties. Spirals can attain high heat-transfer coefficients with particle-loaded fluids, while avoiding fouling, plugging, unequal fluid distribution or dead spots in both channels. Other significant duties involve vapor/liquid and gas or vapo/liquid service where the spiral's subcooling capability and long condensation path maximizes recovery.
Plugging Resistant And Easily Cleanable
The spiral heat exchanger’s single flow channel is inherently self-cleaning and fouling-resistant, because flow cannot bypass an obstruction. As a result, the flow distribution within both channels remains even and steady throughout the exchanger. Temperature differences between the fluids of less then 3°C (5°F) can be reached. The shell & tube unit instead develops an uneven temperature profile caused by fouling, tube plugging and poor flow distribution, with both dead spots and eroded surfaces.
In particle-laden service, any heat exchanger must be installed with provision for ease of cleaning. Here, the compact and thermally efficient spiral, able to be cleaned virtually within its own physical footprint, has a tremendous advantage. Not only is the shell & tube of equivalent thermal duty much larger, but it also requires more than twice its installed footprint for the tube bundle to be pulled for cleaning. Thus in retrofit service, the compact spiral exchanger can be readily integrated within existing footprints with low installation costs.
With its easily openable, hinged end covers, the spiral provides ready access to both channels for visual inspection and cleaning. The shell & tube unit must be laboriously disassembled to inspect the shell side, and special scopes are necessary to inspect each tube individually.
Specially Designed And Built To Perform And Last
The Tranter Spiral Heat Exchanger design is based on two or four metal strips, onto which spacer studs are welded and then wound around a core, using a continuous, single-thickness strip from core to shell. This is a distinct improvement over other designs that use multiple strips of different thicknesses butt-welded together that could lead to premature failure. In addition, Tranter’s design has a Code-conforming, truly round shell enabling better gasket and end cover sealing than the non-circular traditional design.
Tranter also offers multiple center core designs to precisely suit the flow distribution and durability demands of individual applications. The duty-optimized core, together with the spiraling channels and studs, create turbulence at low Reynolds numbers. Heat transfer is enhanced, while fouling is reduced.
A spiral exchanger by nature must be quickly openable, cleanable and closable, and yet leakproof during operation. The Tranter Spiral Heat Exchanger has special design features for productivity, sealing integrity and long life. Tranter exchangers have robust saddle supports, a sturdy saddle-mounted post and reinforced hinges to eliminate sagging and maintain cover alignment. Our M30 (1-1/8 in.) diameter clamp bolts ensure a tighter seal without deformation or fatigue that may occur with lighter clamp bolts. We think you will agree that Tranter’s attention to the design details promises you a spiral exchanger that saves money.
The spiral heat exchanger is a special-purpose, custom-engineered process system. Because of this, Tranter understands your need for an accountable partner from concept through life-cycle operation, including documentation, process engineering support, response to proposal needs and customer service spanning installation, startup and operation. We’re known as The Heat Transfer People, and we’re ready to show you why.