Common plate coolers failures and causes: Most of the reasons for the medium leakage or seal flushing out of the plate coolers are caused by the following reasons:
First, the pressure supply pressure of the cooler is not set by the regulator or pressure reducing valve or is unstable.
Second, the intermittent oil return of the system also has a large difference in parameter values (the large oil return drop is caused by the fast and slow movements of the actuator).
Third, the return oil filter is set at the oil outlet of the cooler (easy to generate pressure shock and back pressure).
Fourth, the solenoid water valve is installed in the cooler; The bypass valve is installed in the cooler circuit (the safety valve is replaced by a fixed-value check valve to ensure that the cooler is not overloaded when used), and the bypass valve is usually used.
Fifth, the user has not been trained in the professional norms of the unit to operate or has not formulated institutional rules and regulations for operation and maintenance.
Sixth, manual control and centralized control are water supply methods, which invisibly increases the probability of emergency operation or misoperation.
Let’s briefly talk about the plate coolers, which is composed of stacked corrugated metal sheets, and thin rectangular channels are formed between the plates, and half sheets are used for heat exchange. Compared with shell-and-tube heat exchangers, it has a higher heat transfer coefficient when the pump power is consistent with the flow resistance.
The plate coolers have the characteristics of small footprint, high heat transfer coefficient, light weight, low price, easy production, and large logarithmic average temperature difference.
The thickness of the plate is only 0.4~0.8mm, and the internal turbulence is difficult to scale, and it is easy to clean, and the compression bolt can be loosened. It is used in electric power, machinery, central heating, chemical, refrigeration, prevention, papermaking, metallurgy and other industries. For example, heating washing slurry, heat recovery bleaching process; cooling steelmaking processes, cooling or heating aluminate mother liquor; heating and cooling of animal and vegetable oils and juices; Cooling all kinds of quenching, cooling reducer lubricating oil, etc. In daily use, it is inevitable that failures will occur, which requires operators to pay attention to the operation according to the operation specifications.
