During on-site operation, if the fin side of a tubular fin heat exchanger carries liquids prone to fouling, the fouling layer will gradually cover the fin surface, reducing heat transfer efficiency, causing the medium outlet temperature to deviate from the set value, and increasing fan power consumption. The cleaning cycle is forced to shorten, and the workload for disassembly and assembly increases, affecting continuous production.
The KFS-820 tubular fin heat exchanger requires the medium name, flow rate, inlet and outlet temperatures, and allowable pressure drop during the selection stage, based on which thermal and resistance calculations are performed. For liquids prone to fouling, it is recommended to avoid arranging them on the fin side, or to reserve a detachable cleaning structure. For high-temperature dust-laden conditions, the fin spacing can be designed at 8–12 mm to reduce ash bridging; the base tube can be made of heat-resistant alloy steel, with a design task temperature of up to 850°C, meeting the hot air circulation requirements of heater matching.
This model is suitable for hot air circulation systems, waste heat recovery devices, and process gas cooling scenarios. Maintenance personnel can determine the cleaning timing based on inlet and outlet temperatures and pressure drop changes, and routinely check the fins for deformation, ash accumulation, or corrosion. If the medium has a high dust content, it is recommended to periodically use compressed air blowing to maintain unobstructed airflow channels between the fins.
During inspection, record the medium inlet and outlet temperatures, flow rate, and pressure drop, and compare them with the design conditions. If the pressure drop continues to rise or the heat exchange effect decreases, check whether the fin side has ash accumulation or fouling. Avoid using hard tools that may damage the fins during cleaning; for alloy steel base tubes, control the cleaning agent composition according to material requirements. Before long-term shutdown, drain the internal medium to prevent low-temperature freezing cracks or corrosion.
