How to understand the service life of plate heat exchanger

The stainless steel metal plates of the plate heat exchanger are inserted and assembled in a mutually inverted mode, so that a mesh contact can be formed so that the fluid in the channel becomes a mesh fluid. As a high-efficiency, energy-saving, cost-effective, and small footprint, plate heat exchangers are widely used in various industries. The service life of How to understand the service life of plate heat exchangerplate heat exchangers in different industries is different. The most common chemical industry is generally used in the chlor-alkali process, phosphoric acid or sulfuric acid cooling and other working conditions. Under this extremely harsh working condition, the plate heat exchanger must be resistant to high temperature, high pressure, and corrosion, and its normal service life is only 2 -3 years. Many big factories usually change every year.

In the hotel domestic hot water industry, the most common heat exchange is steam-water and water-water heat exchange. As long as the corresponding material is selected according to the correct parameters and the operation method is correct, the service life of the general plate heat exchanger can reach more than 8 years. If the steam temperature reaches 120 degrees, the use of 304 plates can easily cause stress corrosion, thus affecting the service life. Generally, we will choose 316L plates and high temperature resistant EPDM gaskets, so as to eliminate the problem of short life from the source.

The photovoltaic industry needs to polish the polysilicon that has just been cut from the slicer to prevent workers from being cut by sharp edges during assembly. Therefore, a plate heat exchanger is used to polish polysilicon with mortar. On the other side, cooling water is used to carry out a cooling cycle of the mortar. Since mortar is a medium with large particles and high viscosity, the plate heat exchanger will be blocked after a long time. The general life of the plate heat exchanger in this system is only about 4 years, and this is only an intermediate value, and there are longer and shorter ones.