Views:0 Author:Site Editor Publish Time: 2020-06-16 Origin:Site
Use a cleaning pump, a cleaning tank, and a chemical cleaning cycle system composed of plastic pipes, and place the removed heat transfer sheets in the cleaning tank in order (the heat transfer sheets should be parallel to the direction of water flow). After the water is injected, check whether the system is normal.
Chemical cleaning process implementation
Add an appropriate amount of cleaning agent and start cycle cleaning. According to the chemical cleaning process, the concentration of the cleaning agent in the cleaning tank is checked every 1h during the cycle, so that the concentration of the cleaning agent is always kept within a safe and effective range of 0 · 10 ~ 0 · 15mol / L, and according to the measurement Add cleaning agent to data. In the early stage of cleaning, in comparison with the reaction, a large amount of foam appeared, and the defoaming agent could be sprayed to defoam. At the same time, when the concentration of the cleaning solution was not changed for 2 consecutive hours or the change was very small, and the scale on the surface of the heat transfer sheet was significantly reduced. It can be removed with a light brush with a plastic brush. At this time, it can be regarded as the end of the cleaning.
After the chemical cleaning is completed, remove the heat transfer sheet one by one, and use a washing machine to remove the residual scale on both sides of the heat transfer sheet. If necessary, use a plastic brush to assist in scrubbing. During the cleaning process, the pressure of the washing machine should not be too high, and 490 ~ 588kPa is appropriate. The water column should not be perpendicular to the heat transfer sheet, and there should be a certain angle to avoid damage to the heat transfer sheet. At the same time, the order of the heat transfer plates and the safety of the gaskets on the heat transfer plates should be paid attention to.
After the descaling is completed, start from the fixed pressing plate in the order of superposition of the heat transfer sheet when disassembling, and then stack the heat transfer sheets along the track in turn (note that the sealing rubber pad on the heat transfer sheet should not be replaced, if there is a replacement sealant available) . After all the heat transfer plates are installed, carefully press the movable compaction plate along the track, and place the compaction bolts in the wire grooves in turn, and evenly, slowly, and symmetrically (otherwise it is easy to crush or crush the heat transfer plate). Deflection, causing the plate heat exchanger to leak water or air) until the compressed net size of the heat transfer fin reaches or is slightly smaller than the original size.