Plate Heat exchanger manufacturer, industry solution expert

What are the common failure types of brazed plate heat exchangers? How to repair? _

by:DIGUANG     2021-03-31
What are the common failure types of brazed plate heat exchangers? How to repair?

2020-04-21 15:36
If the 700 brazed plate heat exchanger is improperly operated during daily use, coupled with not paying attention to maintenance, it is easy to have problems, which will affect the operation status and use effect of the equipment. Therefore, when we find a problem, we must deal with it in time to avoid greater damage to the equipment. Then do you know what are the common failure types of brazed plate heat exchangers? How to repair? The brazed plate heat exchanger is a device for heat exchange through heat conduction. The heat exchange can be two media or more than two media for heat exchange; it has energy saving and environmental protection, small footprint, convenient cleaning, and heat exchange efficiency. Good and so on advantages. The main purposes of plate heat exchangers are: heating, evaporating, cooling, and condensing. It has a good performance in domestic drainage and waste heat utilization. If the daily drainage is water with heat, it can be used as a heat source to heat tap water and used as domestic hot water; the same can be done with waste hot water in baths. Workshop circulating water, equipment circulating lubricating oil, compressor waste heat, etc. can all use plate heat exchangers to heat tap water as domestic hot water, etc. Plate heat exchangers are mainly used for water-to-water heat exchange, water-liquid heat exchange, and soda water. Heat exchange, vapor and liquid heat exchange, and hotels, hotels, swimming pools and other industries produce a large amount of domestic waste hot water every day. The use of plate heat exchangers for waste heat recovery is perfect, because plate heat exchangers have Energy saving, small footprint, high heat exchange efficiency, convenient disassembly and assembly, etc. Water pressure test: Newly installed equipment and heat exchangers that have been disassembled and repaired or replaced with plates shall be subjected to a water pressure test again. Water for hydrostatic test, water temperature ≥5℃. The hydraulic test is carried out on one side. When the test pressure is ≤0.1MPa, the pressure is slowly increased to the specified pressure. Hold the pressure for 30 minutes, and no leakage is qualified. When the test pressure is greater than 0.1MPa, slowly increase the pressure to one-half of the specified test pressure. After the pressure is maintained for 10 minutes, release the pressure. Change to the other side, slowly increase the pressure to one-half of the test pressure, and hold the pressure for 10 minutes , Then slowly increase to the specified pressure, hold the pressure for 30 minutes, release the pressure and try the other side again, slowly rise to the specified test pressure, and hold the pressure for 30 minutes without leakage as qualified. The hydraulic test pressure is 1.25 times the design pressure. If a leak is found, it can be re-tightened by 2 to 3 mm according to the specific situation and retry the pressure. Precautions for water pressure test: The air in the equipment must be drained before the pressure is increased. No overpressure test is allowed. The nuts should be tightened evenly. It is forbidden to press the L value of the plate in the equipment to be less than Lmin. The above is an introduction to the common fault types and maintenance schemes of brazed plate heat exchangers, and interested friends can learn about it. For more information about the maintenance plan, steps and process of the plate heat exchanger, please visit the official website of Diguang Heat Transfer. Welcome everyone to browse.
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