What Is Scaling In Heat Exchangers?
In many cases, plate heat exchangers are prone to fouling, which will seriously affect the heat exchange efficiency of phe. Most of plate heat exchangers are heat transfer system with water as the heat carrier.Due to certain salts.when the temperature rises, it crystallizes from the water and adheres to the heat exchange plate surface to form scale.
Adding a polyphosphate buffer to the cooling water can also cause scale precipitation when the water pH is high. The scale formed in the initial stage is relatively soft, but as the scale layer is formed, the heat transfer conditions are deteriorated, the crystal water in the scale is gradually lost, and the scale layer is hardened and firmly adhered to the surface of the heat transfer plate.
In addition, when the phe working condition of is suitable for solution precipitation, the surface of the heat exchange plate can accumulate the scale layer formed by the crystallization of the material; when the fluid contains more mechanical impurities, the fluid flow rate is small, some mechanical impurities or organic matter will also deposit in the heat exchanger to form loose, porous or colloidal dirt.