Cleaning pipeline system and production process of spiral plate heat exchanger

For the installation of spiral plate heat exchanger, engineers and technicians who are familiar with the process of the system shall be invited to guide, and the installation process scheme shall be determined according to this manual, product quality certificate and system process characteristics. During the installation, the direction of the pipeline should be used to absorb the thermal expansion as much as possible, and the installation should be horizontal and aligned, without additional stress, so as to avoid adverse effects on the equipment. In order to improve the heat transfer effect, the pipe connection should make the two processes completely countercurrent.
Before the installation of the spiral plate heat exchanger, the pipeline system should be cleaned. During the operation, there should be no sediment, debris, etc. left in it. Check whether the heat exchanger is damaged during transportation and whether there are large debris falling into the pipe orifice. After the installation of the equipment, the equipment and system shall be subject to hydrostatic test.
After the hydrostatic test of spiral plate heat exchanger, the equipment should be insulated. The circulation must be softened or treated with chemicals. Due to improper water treatment, scaling can be removed by chemical cleaning. In the production process, due to water erosion, cavitation and micro chemical medium corrosion of the tube sheet of the spiral tube sheet heat exchanger, leakage often occurs at the weld of the tube sheet, which leads to the mixing of water and chemical materials, and the production process temperature is difficult to control, resulting in the generation of other products, seriously affecting the product quality and reducing the product grade.
After the condenser tubesheet weld leakage, enterprises usually use the traditional repair welding method to repair. The tubesheet is easy to produce internal stress, and it is difficult to eliminate, resulting in leakage of other heat exchangers. Through pressure, inspection of equipment repair, repeated repair welding and experiments, 2-4 people need a few days to complete the repair. After a few months of use, the tubesheet weld corrosion occurs again, which causes serious damage Enterprises bring waste of human, material and financial resources, and increase of production costs.