1 Analysis of the causes of seal failure and related preventive measures

1.1 Pressure
Plate heat exchanger type has removable, sealed, such as plate removable heat exchanger in the rated working pressure, leakage, in addition to the equipment in the manufacturing quality, mainly with the system has an abnormal impact load, which is not easy for the operator to find the phenomenon. Shock caused by an instantaneous pressure increase, the pressure may be higher than the normal pressure 1 to 3 times, so that the installation of the plate heat exchanger in the sealing gasket displacement, resulting in seal failure. And because of the equipment of the heat transfer element is manufactured by the sheet one-time forming, the thickness of 0.5 ~ 0.8mm, sealing the rigidity, bearing relatively poor, and there are heat exchanger plate periphery longer, impact resistance is relatively bad, compared to other heat exchangers such as tubular to be much worse.
In this regard, appropriate precautions should be taken: depending on the operating pressure, increase the design pressure of the equipment for the use of pressure 1.5 ~ 2 times; use should try to avoid the impact phenomenon in the system; special circumstances to take measures to increase the thickness of the plate.
1.2 Temperature


1.3 Time


1.4 Operating conditions

2 Plugging and fouling failure reason analysis and corresponding preventive measures

2.1 Plugging
Plate heat exchanger circulation gap is small, about 2.5 ~ 6mm, diameter greater than 1.5 ~ 3mm particles and debris are easy to block the channel, so that the pressure drop in the equipment changes dramatically, the circulation is reduced, the heat transfer effect is reduced, easy to make the equipment failure. Preventive measures can be set in the media inlet filter or flushing device, regular cleaning or processing.
2.2 Scaling

3 Analysis of the causes of corrosion failure and preventive measures

In this regard, the following effective preventive measures should be taken: the correct choice of plate materials; regular cleaning of dirt to destroy the conditions and development of corrosion; the choice of non-chlorine-containing elements of the binder.

4 Design, manufacture and installation of the reasons for analysis and measures

Due to the characteristics of plate heat exchanger high efficiency and energy saving, widely used in many fields, dealing with a variety of media, in the use of the production process, even more conditions are different and diverse. The choice of gaskets is critical, if the choice is not appropriate, the material does not meet the physical properties of the process media, elasticity is not good, in use, there is a de-padding, elongation, deformation, aging, fracture and so on.

5 Conclusion