Three defects of plate heat exchanger cleaning
Based on the above reasons, to stop pouring time in casting machine when the plate heat exchanger the disintegration of cleaning dirt, due to a short interval of time, the mechanical cleaning is the way to open a piece of plate heat exchanger cleaning, found the following defects in the process of cleaning.
1, because the the Yellow River industrial water calcium and magnesium ions is relatively high, at a high temperature heat exchanger of industrial water node scale is relatively hard, if you use a piece of iron brush brush, increase the intensity of this work of workers, and the plate is often easier to scratch, brush after fouling; cleaning effect.
2, the heat exchanger must be disassembled when cleaning, easy to damage the gasket in the process of disassembly and assembly, often because the assembly is too tight and cause the metal plate or gasket damage, or because the assembly is not tight enough to leak. Cause the metal plate between the medium leakage and demineralized water cooling water heat exchanger using continuous casting equipment, often appear leakage phenomenon, desalted water into industrial water, increase the cost of desalted water and heat exchanger spare parts of a large loss also increases the cost of the equipment.
3, the regular removal of heat exchanger, the hanging notch metal plate at both ends of the deformation, deformation will not occur due to notch of metal plates, so the metal plate is easy to deform, when water flows through the heat exchanger, will affect the flow rate, increasing of scaling and corrosion of the heat exchanger, see figure 1. Plate heat exchanger is a kind of heat exchanger which is made up of thin metal plate (usually stainless steel), which is pressed into a heat exchange plate with a certain shape, and then is sealed by a sealing rubber pad.
It is mainly composed of heat transfer film, sealing pad, clamping bolt, pressing plate, frame and so on. Hot and cold medium through the adjacent heat exchanger plates through their respective channels, through the middle of a thin layer of heat exchange plate heat exchanger, therefore, high efficiency and energy saving, high heat transfer coefficient, also easy scaling; at the same time the internal circulation of small aperture plate heat exchanger, after scaling the internal variable cross-section channels and even small plug, resulting in heat exchanger heat exchanger efficiency is reduced, thus affecting the normal production and equipment safety, therefore, heat exchanger should be regularly carried out chemical cleaning, remove dirt, to ensure the normal production of high efficient heat transfer and heat exchanger.
