Plate heat exchangers generally use water-water, steam-water, oil-water, oil-oil and other media. Due to the excessive impurities in circulating water used by some factories or improper operation of water treatment equipment, the calcium magnesium carbonate in the water will be decomposed into calcium carbonate and magnesium hydroxide precipitates after being heated by circulation. Some of these precipitates are bonded to the heat exchanger plates that are heated to form hard scale. The other part is suspended in the circulating water and deposited on the heating surface with a lower flow rate to form secondary scale. So how to clean the dirt of the plate heat exchanger?
(1) Circulating water cleaning. Circulating cleaning for heat exchange equipment online. Ordinary equipment is completed in 3-5 hours, and the large system does not exceed 12 hours.
(2) Soak and clean. For some smaller condensers, the immersion method can be used for 4-6 hours.
(3) Spray cleaning. For plate heat exchangers with large surface fouling, spray cleaning can be used.