Plate-shell thermal equipment combines the strengths of plate type and shell-and-tube structures. The whole unit is assembled with various parts including shell, corrugated heat transfer core, sealing elements, pressure-resistant flow guides and fastening accessories. Each component performs distinct functions to jointly withstand harsh working conditions such as high pressure, extreme temperature and corrosive media. The material selection and machining precision of every accessory directly determine the maximum pressure bearing capacity and operational stability of the whole unit.

Corrugated heat transfer plates act as the internal heat exchange core. Different from open plates of gasketed equipment, every two plates are continuously welded around the edges to form independent sealed cassettes, which make up the internal heat transfer core installed inside the cylindrical shell. Dense customized corrugations on plates enhance turbulent heat transfer. Plates can be made of stainless steel, titanium, Hastelloy and other anti-corrosion metals for refrigerants, high-salinity wastewater, acidic and alkaline chemical fluids. All plate welds pass tightness inspection to eliminate cross-contamination between media and support much higher working pressure than fully gasketed structures.

Cylindrical pressure shell serves as the outer load-bearing protection component, mostly rolled and welded from carbon steel or stainless steel with wall thickness customized according to system pressure grades. Channel boxes and medium inlet/outlet nozzles are arranged at both ends of the shell to hold welded plate cassettes, isolate external surroundings and buffer medium impact and equipment vibration. Inspection ports and drain outlets are reserved on the shell for regular sludge discharge and internal inspection, and anti-corrosion coating can be applied on the outer surface for outdoor and humid workshop installation.

Flow distribution and collection parts consist of internal baffles and inlet/outlet distributors. Distributors evenly spread shell-side fluid into the cavity between shell and plate bundles to prevent high local flow velocity from eroding plate welds. Baffles regularize fluid flow paths to extend heat exchange distance and improve heat transfer efficiency. For multi-pass process requirements, the layout of baffles can be adjusted to alter fluid directions and match different heat loads flexibly.

Sealing and pressure-resistant auxiliary parts include shell flange gaskets, end cover seals and pressure retaining rings. The shell side channel has no complicated internal gaskets; temperature-resistant sealing components are only arranged at nozzles and end covers, greatly reducing contact between corrosive media and rubber parts and lowering leakage risks. Metal spiral wound gaskets for flanges withstand high temperature and pressure without aging failure during long-term operation.

Fastening and supporting assemblies include high-strength main bolts, positioning brackets and core support guide rails. Multiple sets of heavy-duty bolts lock channel box flanges on both ends to guarantee shell sealing and pressure resistance. Bottom guide rails support the welded core to avoid suspension and shaking during operation and reduce fatigue damage on welds. Lateral positioning brackets fix the core to prevent plate bundle displacement caused by fluid impact.

External supporting accessories cover drain valves, air vent valves, temperature & pressure measuring ports and equipment base. Air vents remove accumulated gas inside the shell to avoid heat transfer resistance formed by air film; drain valves discharge sediment regularly to prevent blockage of plate corrugations; height-adjustable bases balance the unit and reduce vibration wear to extend the service life of all components.

All parts form a dual internal and external pressure-bearing system. Welded cassettes handle heat exchange while the cylindrical shell provides external pressure protection. Coordinated accessories solve common industrial pain points including high pressure, corrosion and leakage, making this thermal equipment a reliable option for harsh working conditions in chemical, oil & gas and refrigeration industries.