For complex working conditions in chemical processing, industrial refrigeration, new energy and other sectors, many projects face combined challenges including corrosive fluids, high operating pressure and easy equipment maintenance. Conventional heat transfer units rarely satisfy all three demands simultaneously, while this composite heat transfer unit delivers cost-effective performance under harsh operating environments via innovative structural design.

It adopts a dual-channel design combining laser welding and sealing gaskets. Two corrugated metal plates are precisely laser-welded into independent sealed cassettes, dedicated to refrigerants, acidic/alkaline corrosive liquids and high-pressure hazardous media. The welded construction delivers superior tightness, drastically lowering risks of fluid leakage and cross-contamination between two media streams. Cassettes are separated by anti-aging gaskets to form a secondary circuit for clean mild fluids such as cooling water and thermal oil, realizing partitioned heat exchange between hot and cold fluids.

Compared with fully gasketed units, it features upgraded pressure and temperature resistance, with a maximum working pressure up to 5.0MPa. Equipped with anti-corrosion plates including 316L stainless steel, titanium and Hastelloy, it sustains long-term operation with ammonia water, chloride solutions, dilute sulfuric acid and other aggressive substances. Different from fully welded integrated units, it retains a detachable frame structure. Loosening clamping bolts allows full access to the gasket side for mechanical cleaning, CIP sanitization and plate inspection/replacement, cutting downtime and reconciling tight sealing with convenient maintenance.

Internal corrugated channels boost fluid turbulence, delivering far higher heat transfer coefficients than conventional shell-and-tube units. It occupies over 60% less space under equivalent thermal load, ideal for factories with limited installation space and modular capacity expansion. When production capacity rises afterward, users can simply add or remove plates to adjust heat transfer area without full equipment replacement, cutting long-term energy consumption and renovation expenses.

Its wide application scope covers multiple industries: evaporators and condensers for industrial cold storage and CO₂ cascade refrigeration; temperature control for fine chemical reactors and waste heat recovery; cooling for hydrogen electrolyzers and thermal energy storage heat pumps; sanitary thermal processing for food & pharmaceutical production, marine seawater cooling and more. Custom gaskets and corrosion-resistant plate materials are available to match diverse media, catering to low-temperature phase change, high temperature & high pressure, and heavy corrosive processes.

With dual merits from its composite structure, this unit eliminates leakage hazards caused by corrosive fluids eroding gaskets, while avoiding the non-detachable cleaning limitation of fully welded equipment. It serves as an all-round heat transfer option that prioritizes production safety, energy efficiency and sustainable maintenance costs.