The core structure of the spiral plate heat exchanger is composed of two parallel metal plates rolled into concentric spiral channels. The cold and hot fluids flow in opposite directions in adjacent channels respectively and exchange heat through the plate walls. It is widely applied in fields such as chemical engineering, petroleum, pharmaceuticals, food, energy and environmental protection.
Two steel plates are rolled to form two sets of spiral channels. The channel spacing is supported by spacer columns to ensure uniform fluid distribution and structural stability.
The ends of the channels are sealed by welding or gaskets to prevent fluid leakage. Different materials (such as stainless steel, titanium alloy, etc.) can be selected based on the medium characteristics.
Cold and hot fluids enter from the tangential inlet on both sides of the spiral body and flow along the spiral path, prolonging the heat exchange time and improving efficiency.
The two fluid channels are separated by spacer columns welded during the rolling process or a special structure during rolling to avoid cross-contamination.
A cylindrical shell wraps the spiral plates, with both ends sealed. It is usually designed as detachable for cleaning.
Located at both ends of the spiral channels, the fluid flows in/out from the center or is distributed along the periphery, depending on the flow direction (full counter-flow or cross-flow).
The spiral plate heat exchanger and the detachable plate heat exchanger are two types of heat exchange equipment with different structures and working principles. The main differences are as follows:
The spiral plate heat exchanger is formed by rolling two parallel metal plates into concentric spiral-shaped channels. The cold and hot fluids flow counter-currently or cross-currently within the spiral channels. The interior usually has a welded sealing structure and cannot be disassembled for cleaning or maintenance.
The detachable plate heat exchanger is composed of multiple corrugated plates stacked together. The plates are sealed with rubber gaskets, forming alternating cold and hot fluid channels. The plates can be disassembled by loosening the compression bolts, making it convenient for cleaning, replacement or expansion.
The spiral plate heat exchanger is suitable for high-viscosity/dirty media: such as sludge, fluids containing fibers or particles. The welded structure has a strong pressure-bearing capacity (up to 2.5 MPa or more).
The flow channels have a large curvature and are not prone to clogging.
The detachable plate heat exchanger is suitable for clean media: such as water, steam, oil and other low-viscosity fluids. For media prone to scaling, frequent cleaning is required. Due to the limitation of the gaskets, it is usually used in occasions with a pressure of ≤1.6 MPa and a temperature of ≤200℃.
The maintenance of spiral plate heat exchangers is challenging: when clogged or leaking, overall repair or replacement is required.
The detachable plate heat exchanger is convenient for maintenance: individual replacement of plates or gaskets is possible, and cleaning is easy.
Spiral plate heat exchangers are used in industries such as chemical engineering, papermaking, wastewater treatment, and heating/cooling of high-viscosity fluids.
Removable plate heat exchangers are applied in HVAC, food and beverage, pharmaceuticals, and low-pressure steam condensation.
The plate heat exchanger forms a heat transfer channel by superimposing multiple layers of corrugated metal plates, and realizes heat exchange between cold and hot fluids by using complex flow channels formed between plates.
The plate heat exchanger forms a heat transfer channel by superimposing multiple layers of corrugated metal plates, and realizes heat exchange between cold and hot fluids by using complex flow channels formed between plates.
The plate heat exchanger forms a heat transfer channel by superimposing multiple layers of corrugated metal plates, and realizes heat exchange between cold and hot fluids by using complex flow channels formed between plates.
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