The plate heat exchanger is a high-efficiency heat exchanger which is assembled from a series of metal sheets with a certain corrugated shape. A thin rectangular channel is formed between the various sheets, and heat is exchanged through the heat transfer plates.Then How to use plate and frame heat exchangers?
(1) Avoid icing of plate heat exchanger
When the temperature is below zero degrees Celsius, the water inside the plate heat exchanger will freeze, and the ice will increase in volume, and then form a plate heat exchanger burst. Therefore, the installation of plate heat exchanger is necessary to equip drainage equipment to facilitate water dischagerd when the plate heat exchanger shelve.
(2) Dust treatment in water:
Solid dust: a solid that does not melt into water and is easy to block pipes and heat exchangers.Fiber blunt material can not pass through the cooler, it must be removed by some means.Particles and debris should not be less than 0.8mm. A 40-70 guideline power filter is recommended. However, the power filter must be maintained on schedule to remove blunt objects.Material soluble in water. Under the effect of high temperature, calcium and magnesium ions in water will form ditch scale, which will affect the heat exchange rate of plate heat exchanger and reduce the performance of plate heat exchanger.The treatment method is to reduce the content of calcium and magnesium ions in water.Dust disposal: In the actual application of plate heat exchanger, the recycling water and dust will be slowly reduced, so the plate heat exchanger should be treated after a period of time.
(3) Corrosion resistance:
Stainless steel is corrosive to most chemicals, but it is slow to chloride ion.Therefore, it is necessary to restrict its lightness at 280 ppm (below 55 C). And the PH value of water needs to be kept between certain scales.