Spiral Threaded Tube Heat Exchanger

Spiral threaded tube heat exchanger:​High heat transfer efficiency; the threaded tube structure and helical flow channel create a dual enhancement effect, resulting in a heat transfer coefficient that is 2-3 times higher than that of traditional shell-and-tube heat exchangers.Even under conditions with small temperature differences (2-5℃), it can still maintain efficient heat exchange, with heat recovery efficiency increased to over 90% and energy saving rate exceeding 10%.

Conventional shell-and-tube heat exchangers:It has moderate heat transfer efficiency, adopts a traditional straight pipe flow channel design, has weak turbulence effect, relatively low heat transfer coefficient, and heat exchange efficiency drops significantly under small temperature difference conditions. The heat recovery efficiency is usually 60%-70%.

Standard plate heat exchanger:It has high heat transfer efficiency, relying on the narrow flow channels between the plates and the corrugated structure of the plates to enhance heat transfer. However, due to the limitations of the plate material and sealing performance, the heat transfer efficiency is easily affected under high temperature, high pressure or high viscosity conditions, and the applicable scenarios are limited.

Spiral threaded tube heat exchanger: Compact structure, multi-layer spiral winding design significantly increases the heat exchange area per unit volume (up to 2-3 times that of ordinary heat exchangers).With the same heat exchange capacity, the equipment volume can be reduced by 50%-70% and the weight by 40%-60%, which can effectively save factory installation space and infrastructure construction costs.​

Conventional shell-and-tube heat exchangers:Due to their large size, the straight tube bundle arrangement requires ample space for maintenance and flow channels. The heat exchange area per unit volume is small; for the same heat exchange capacity, their volume is typically 2-3 times that of a spiral threaded tube heat exchanger, placing significant demands on installation space.

Standard plate heat exchanger:The structure is relatively compact, and the plate stacking design reduces some space occupation. However, space needs to be reserved for plate disassembly and maintenance. Also, due to the limited plate size, the volume of large heat exchange area equipment will still increase significantly. The overall compactness is not as good as that of spiral threaded tube heat exchangers.

Differences in temperature and pressure resistance

Spiral threaded tube heat exchanger:It boasts excellent temperature and pressure resistance, employing a fully welded sealed structure and utilizing high-strength metal materials such as stainless steel and titanium alloys. Its design pressure can reach over 20 MPa.It is suitable for a wide temperature range from -40℃ to 400℃, making it compatible with high-temperature and high-pressure industrial applications such as petrochemicals and power generation.

Conventional shell-and-tube heat exchangers:It exhibits moderate temperature and pressure resistance. While pressure resistance can be improved by thickening the shell and tube bundle, this is limited by the connection process between the tube sheet and the tube bundle.Conventional design pressures are typically ≤10MPa, and applicable temperatures are ≤300℃. Sealing leaks are prone to occur under high-temperature and high-pressure conditions.

Standard plate heat exchanger:It has poor temperature and pressure resistance and relies on rubber gaskets to achieve sealing. The gaskets have limited ability to withstand high temperature and high pressure. The conventional design pressure is ≤2.5MPa and the applicable temperature is ≤150℃. Exceeding this range can easily lead to sealing failure and media leakage.

Differences in service life

Spiral threaded tube heat exchanger:With a long service life, it adopts a minimum gap tube bundle design and combines the Owen turbulence chattering frequency criterion to effectively eliminate fluid-induced vibration, avoid tube wall wear and fatigue damage, and with corrosion-resistant materials, the equipment service life can reach 10-15 years.

Conventional shell-and-tube heat exchangers:With a medium service life, tube bundle vibration is a significant issue. Long-term operation can easily lead to problems such as tube sheet leakage and tube bundle corrosion. The typical service life is 5-8 years, and tube bundles or seals need to be replaced periodically to extend the service life.

Standard plate heat exchanger:With a relatively short service life, the gasket is a vulnerable part. It is easily aged and fails due to long-term exposure to temperature, pressure and media corrosion. The gasket usually needs to be replaced every 3-5 years. The plate is also easily damaged by scaling or corrosion, resulting in a relatively short overall lifespan.