Although, among the many different types of heat exchangers, the plate heat exchanger has won the recognition of customers and has a place in the market with its own advantages, but the plate heat exchanger itself will also cause equipment failure in the process of operation due to various factors. When the plate heat exchanger fails, it is necessary to check and deal with it in time, otherwise it will cause immeasurable losses. And the fault inspection of the plate heat exchanger in the process of selection is a systematic and meticulous process, involving a variety of inspections and diagnoses.
Fault phenomenon recognition, it is necessary to clarify the specific fault phenomena of the plate heat exchanger unit in operation, such as the decrease in heat exchange efficiency, abnormal system pressure, equipment vibration and noise increase, liquid leakage, etc. These fault phenomena are the basis for subsequent fault checking.
Basic inspection, appearance inspection includes, check whether there is damage, rust or leakage on the external part of the equipment, whether each connection part is tightened to prevent leakage due to looseness. Then check and record the current temperature, pressure, flow and other operating parameters, and compare them with the parameters under normal working conditions.
Detailed inspection to check if there is scaling or blockage inside the heat exchanger, which affects the heat exchange efficiency. If necessary, chemical cleaning or physical cleaning can be performed. Check if the inlet valve is fully opened to ensure smooth flow. Check if the foundation and support of the equipment are firm, and reinforce if necessary. Check if the sealing gasket of each connection part of the plate heat exchanger is worn or aged, and if there is deformation or cracks of the plate causing leakage.
Detection and diagnosis, if the above basic checks and detailed troubleshooting still cannot determine the cause of the fault, it may be necessary to use equipment to further detect and diagnose. For example, use a pressure tester for pressure testing, use an ultrasonic tester to detect leakage points, etc.
When the plate-type heat exchanger unit fails during operation, it can be quickly identified and the cause of the fault can be found through inspection, and the appropriate measures can be taken to quickly eliminate the fault and restore normal operation. In addition, in order to reduce the failure rate of the plate-type heat exchanger unit and extend the service life, it is necessary to regularly clean, inspect and maintain the plate-type heat exchanger unit to prevent the occurrence of faults.