Common problems and solutions for air radiator maintenance

Air radiators are widely used in drying, heating, cooling, and drying applications, such as textile printing and dyeing, stretch setting, papermaking, pharmaceuticals, and starch processing. However, blockage, leakage, and poor heat dissipation are common problems encountered by many users. Based on past experience, we have compiled common causes and solutions, sharing them as a reference for air radiator maintenance and overhaul.

1. Scale and Blockage (Replacement and Selection)

Over long-term use, scaling can occur in different environments, influenced by several factors:

① Fluid Flow Rate

The impact of flow rate on scaling should be considered in terms of both its effects on both scale deposition and erosion. For various types of scale, increasing flow rate significantly increases the erosion rate, rather than the deposition rate. Therefore, the scale growth rate decreases with increasing flow rate.

② Heat Transfer Surface Temperature

Temperature plays a significant role in chemical reaction scaling and salt crystallization scaling. Increased fluid temperature generally increases the chemical reaction rate and crystallization rate, which in turn affects scale deposition and increases the scale growth rate.

③ Heat Dissipation Surface Material and Surface Quality

Of the commonly used carbon tubes and stainless steel, carbon steel is more susceptible to corrosion, leading to scaling and rust. Therefore, choosing a material with better corrosion resistance can reduce scaling. The surface of the material also affects scaling; the rougher the surface, the more susceptible it is to scaling, making material selection crucial.

2. Leakage

Main causes are corrosion, material defects, and long service life. Solution: For common leaks, use chemical patching or glue repair. For severe leaks, replace the heat dissipation tubes and the entire air radiator promptly.

3. Poor Heat Dissipation

Main causes include scaling on the inner wall of the finned tubes, bending and blockage, fin deformation, severe dust accumulation, and fan failure. Solution: Regularly purge or clean the air radiator, inspect and repair damaged fins, and inspect and repair the fan for any malfunctions.