Spiral Heat Exchanger - FAQ
Q1. What are the primary advantages of a Spiral Heat Exchanger?
A. There are three key benefits:
- Self-Cleaning Effect: The single-channel design ensures that if scales or deposits begin to form, the local velocity increases, creating a "scouring" effect that flushes out the debris. This significantly reduces maintenance frequency compared to shell-and-tube exchangers.
- Low Pressure Drop (Type II Condenser): In Type II (Condenser Type) units, the gas/vapor side utilizes a cross-flow design. The gas travels the shortest distance along the axis of the spiral, minimizing pressure drop. This is critical for vacuum distillation and processes sensitive to pressure loss.
- High Heat Transfer Efficiency: The curved flow path induces turbulence (secondary flow) even at low Reynolds numbers, maintaining a high overall heat transfer coefficient (U) and allowing for a more compact design.
Q2. What types of fluids are best suited for this equipment?
A. SHEs excel with "difficult" fluids that often cause issues in other designs:
- High-Viscosity Fluids: Both Type I and Type II designs leverage the spiral's internal agitation to maintain high thermal performance, even with viscous liquids.
- Slurries and Fouling Liquids: The single-passage channel prevents the "partial clogging" common in multi-tube exchangers, ensuring stable long-term operation.
- Low-Pressure Vapors and Corrosive Gases: By utilizing the low-pressure drop characteristics of Type II, efficient condensation is achieved with minimal impact on the process pressure.
Q3. Which regions do you serve?
A. We supply and support customers across Japan, Southeast Asia and Oceania.
- We have local agents in Southeast Asia and Oceania to provide regional expertise. If you are interested in our products or services, please reach out to us via the Contact Page on our website.
Q4. Which regulations and standards do you comply with?
A. We manufacture equipment in compliance with major domestic and international pressure vessel codes:
- Japan: Class 1 & Class 2 Pressure Vessels, and High-Pressure Gas Specific Equipment.
- International: We are an ASME-certified shop (U-Stamp, etc.). We also provide compliance for the CE Marking (PED) for the European market.
Q5. What are the structural differences and maintenance features?
A.
- Type I (Counter-Current): Ideal for liquid-to-liquid heat exchange, maximizing temperature approach.
- Type II (Cross-Flow): Specialized for vapor condensation or evaporation.
- Maintenance: One of the biggest advantages is full channel accessibility. By simply removing the side covers, the entire heat transfer surface is exposed. This allows for direct and thorough mechanical cleaning (e.g., high-pressure jetting), eliminating the "hidden fouling" risks found in shell-and-tube units.