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Structural features and cleaning and maintenance of flat heat exchanger
Dec 03, 2018

The flat heat exchanger is superimposed by a corrugated sheet of a certain shape and a gasket, and is assembled by frame clamping, so that cold and hot fluid flow through the flow passages on both sides of the corrugated board, respectively. Perform heat exchange. The corrugated plate in the plate heat exchanger is usually made of a thin plate of stainless steel, aluminum, titanium, molybdenum or the like having a thickness of 0.5 to 3 mm.


Compared with other heat exchange equipment, the flat heat exchanger has the advantage of high heat transfer coefficient, about 2 to 4 times higher than the shell-and-tube heat exchanger, easy to remove and wash, and can increase or decrease the number of plates to adjust the heat transfer area. The operating pressure is usually not more than 2 MPa and the operating temperature is not more than 250 °C.


With the increasing use of flat heat exchangers, cleaning and maintenance of equipment has become a problem that users must pay attention to. It is strictly forbidden to clean with flat hydrochloric acid when cleaning the flat heat exchanger. It should be regularly repaired, the thermal efficiency is obviously reduced, and the pressure drop should be cleaned when the pressure drop changes significantly.


Cleaning work can open the equipment and wash the sheets one by one. If the scale is serious, the board should be removed and leveled clean; use chemical cleaner to cycle inside the equipment. If there is mechanical cleaning, use soft. Brush, do not use steel brush to avoid scratching the plate. After the equipment is rinsed, it must be wiped dry with a clean cloth. Foreign matter particles and fibers and other impurities are not allowed between the plates and the rubber pads. After the cleaning is completed, the sheets and films should be carefully inspected and the problems should be dealt with in a timely

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