Maintenance and cleaning steps and precautions of brazed plate heat exchanger_
Maintenance and cleaning steps and precautions of brazed plate heat exchanger
After using the 731 brazed plate heat exchanger for a period of time, if you do not pay attention to daily maintenance, it is easy to have some problems. In order to avoid greater damage to the equipment, we must repair and clean it in time Work, then do you know the maintenance and cleaning procedures for brazed plate heat exchangers and related precautions? The following is a brief introduction by the plate heat exchanger repair manufacturer Diguang Heat Transfer: 1. In the chemical, petroleum, papermaking and other industries, the medium and operating conditions are poor, and it should be cleaned and repaired regularly, if possible. Next, it is recommended to circulate flushing without disassembling the body. If the medium is prone to produce polymer, it must be cleaned immediately after parking. 2. Disassembly procedure 2.1 Before disassembling the plate heat exchanger, first measure the compaction length of the plate bundle, and make a record (it should be pressed tighter than the original size when reinstalling) 2.2 Use a wrench to press Figure 15 ,6,7,8,9,10,3,4,1,2, the order cross grouping is loose. 2.3 After the pull rod is removed, move the movable compression plate to one end of the column, and then remove the plate. Hold up the plate first, move the plate to the notch of the upper shaft, and tilt it forward or backward to take it out. As shown in Figure 17, different fouling forms have different disassembly and assembly requirements. Nut disassembly sequence: Use a wrench to loosen the nuts in groups of 5, 6, 7, 8, 9, 10, 3, 4, 1, and 2, according to Figure 15. 3. Cleaning 3.1 The plate heat exchanger should be overhauled according to a predetermined period. If the heat exchange efficiency is significantly reduced and the pressure drop changes significantly, it should be cleaned. 3.2 When the cleaning workload is small, it can be carried out one by one while the plates are suspended. If the scaling is serious, remove the plate and lay it flat for cleaning. 3.3 If a chemical cleaning agent is used, it can be circulated in the equipment. If it is mechanically cleaned, the equipment needs to be opened. To clean the plates, use a soft brush or titanium plates. It is forbidden to use steel brushes to avoid scratching the plates. 3.4 After rinsing with clean water, dry it with a cloth. No foreign particles or fibers are allowed on the board. 3.5 After cleaning, check the plates and gaskets carefully and deal with any problems in time. 3.6 Plate inspection method: coloring method: check with coloring agent. (Four steps of penetration, cleaning, imaging and inspection) Transparency method: place the light source on one side and check on the other side. One-sided pressure test method: One-sided water pressure test to 0.35MPa (gauge pressure), if there is water in the lower part of the other side, quickly disassemble and check the wetness of the sheet. 3.7 Note: The chloride ion content of the cleaning water is not more than 25ppm. The above is all about the maintenance and cleaning steps and precautions of brazed plate heat exchangers, I hope it can help everyone. If you want to know more about the repair price, plan, process, etc. of the plate heat exchanger, please go to the official website of Diguang Heat Transfer for detailed information and consultation.