Precautions for maintenance of plate heat exchanger_
The 952 brand plate heat exchanger may have some failures after long-term use. In order not to affect the normal use of the equipment, we must repair it in time and restore its function as soon as possible. At the same time, in the future use process, we must pay more attention to the maintenance of the brand plate heat exchanger to reduce the frequency of its failure. Let's take a look at the precautions related to the maintenance of brand plate heat exchangers. Under normal circumstances, the allowable pressure of the plate heat exchanger is about 1Mpa, under special circumstances it can reach 2Mpa, and the allowable temperature is 260℃. The working conditions are quite special, so pay attention to maintenance during use. Prevention of scaling inside the heat exchange plate Analysis of the scale samples in the plate heat exchanger shows that the main problems are as follows: 1) The surface of the circulating water side plate has serious scaling, the bottom of the scale layer is hard, and the surface layer is thicker, which is off-white. Loose sediments and fill up the corrugated grooves of the plates in serious places. 2) There are many alluvial foreign bodies on the side of the circulating water, mainly composed of flocs, decay and water system filler fragments, which cause partial blockage of the fluid channels between the plates. The solution is: 1) When there are too many impurities in the cooling water, a filter should be configured. It is recommended to use pure water such as distilled water and neutral water in the evaporator heat pump water-less channel. 2) If the individual plates and local gaskets of the plate heat exchanger are leaking, broken, aging, etc., they should be pressed or replaced. At the same time, the plate heat exchanger should be repaired according to this standard. The relevant steps and requirements listed in the homework are carried out. The maintenance methods for brand plate heat exchangers when they are out of use for a long time: 1) Close the inlet and outlet valves, and vent the medium in the plate heat exchanger; 2) Loosen the clamping bolts to 1.15 times the fixed size. When the brand plate heat exchanger is put into use, the medium valve on the low pressure side should be opened first, and then the valve on the high pressure side should be opened. The above is the relevant introduction to the maintenance precautions of brand plate heat exchangers. For more knowledge points about the maintenance of imported plate heat exchangers, please pay attention to the official website of Diguang!