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The 7 Meter Big Size Heat Exchanger is a large-scale, shell-and-tube or plate-type heat exchanger designed for high-capacity heat transfer in industrial processes. With an overall length of 7 meters, it handles large fluid flow rates (100–500 m³/h) and high heat loads (1–10 MW), making it ideal for power generation, chemical processing, and district heating systems. Its robust construction (carbon steel or stainless steel) ensures durability in continuous-operation environments with aggressive fluids or high pressures.
The 7-meter length provides an expanded heat transfer area (50–500 m², depending on type: shell-and-tube vs. plate). Shell-and-tube models use Φ19mm or Φ25mm tubes (stainless steel 316L) with turbulators to enhance fluid turbulence, achieving a heat transfer coefficient of 2,500–4,000 W/(m²·K).
The shell side (for primary fluid) accommodates flow rates up to 500 m³/h, while the tube side (secondary fluid) handles 100–300 m³/h. The baffled shell design (segmental baffles, 20–30% cut) ensures uniform fluid distribution, minimizing dead zones.
Constructed to withstand working pressures up to 10 MPa (shell side) and temperatures up to 400°C (suitable for steam or high-temperature oils). Plate-type models (titanium or Hastelloy) handle corrosive fluids (pH 1–14) in chemical processing.
The counter-current flow arrangement maximizes temperature difference between fluids, achieving a thermal efficiency of 90–95%. Heat recovery versions reduce fuel consumption in industrial boilers by 20–30% by capturing waste heat from exhaust gases.
Despite its size, the exchanger features flanged connections and support skids for ease of installation. It can be paired with pumps, valves, and control systems (PLC-based) for automated operation and remote monitoring.
Power Plants: Cools turbine lubricating oil and generator coolants (heat load: 5–10 MW).
Chemical Industry: Used in distillation columns and reactor cooling (handles acids, solvents, and slurries).
District Heating: Transfers heat from central boilers to distribution networks, serving 10,000+ households.
Steel Manufacturing: Cools rolling mill lubricants and quenching fluids (temperature range: 50–300°C).
Q: What are the advantages of a 7-meter length in heat exchangers?
A: The longer length reduces fluid velocity (minimizing erosion) while increasing residence time for heat transfer, allowing handling of 50–100% higher flow rates than 3–4m exchangers of the same diameter. It also lowers pressure drop by 15–20% for large-scale systems .
Q: How to maintain a 7-meter heat exchanger?
A: Regular inspection includes tube cleaning (mechanical brushes or chemical circulation) every 6–12 months, depending on fluid cleanliness. Shell-and-tube models have removable tube bundles for access, while plate-type models allow plate disassembly for deep cleaning.
