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Disassembly and cleaning of plate heat exchanger

Views:1     Author:Site Editor     Publish Time: 2020-06-12      Origin:Site

Disassembly and cleaning of plate heat exchanger

First close the inlet and outlet valves of the heat medium of the plate heat exchanger, then close the inlet and outlet valves of the cold medium, drain the medium (usually water or steam), and use a steel ruler to measure the net size of the heat exchanger's compressed heat exchanger. (The distance between the inner surfaces of the two pressing plates) and record. Remove the clamping bolts of the heat exchanger evenly and symmetrically, gently push the movable compression plate along the track, and remove the heat transfer sheet one by one (be careful not to tear or tear off the sealing rubber pad), and follow the order Put it right. Since some heat exchangers use heat transfer fins with multiple lines, it is important to keep in mind the number of fins and the combination order of multiple lines.

Disassembly chemical cleaning

Connection of chemical cleaning circuit

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.

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