Plate heat exchanger is a kind of high-efficiency heat exchanger made of a series of metal sheets with a certain corrugated shape. Plate heat exchangers are ideal equipment for liquid-liquid, liquid-vapor heat exchange.Plate heat exchangers can also block plate passages when fouling is severe.The plate design of the plate heat exchanger has a large number of support points. Fouling can reduce the heat transfer coefficient of the heat transfer equipment. The purpose is to disturb the medium (turbulent the medium to increase the heat transfer coefficient) and support the pressure.Where solid debris is easy to accumulate, its side effect is to cause the fluid to form a local stagnation and generate dirt and nodules. The calcium and magnesium ions in the medium are easily deposited and grown on the nodules after precipitation at an appropriate temperature, forming a honeycomb dirt.How to alleviate the fouling of the heat exchanger?
(1) The plate heat exchanger should not be used in a dirty or fouling environment (unless other effective measures are added). The operating temperature should be controlled at about 50 ° C or lower.
(2) When using unsoftened cooling water as the cooling medium, avoid the sensitive temperature of precipitation of calcium and magnesium ions in the medium. It is also very effective to adopt periodic chemical cleaning or disassembly and cleaning of the plate heat exchanger according to the different use conditions.