How to solve the weld leakage of the condenser tube sheet

Date:2021-02-02

The plate heat exchanger has the characteristics of compact structure, easy operation and maintenance, and high heat transfer efficiency. It has become the preferred heat exchange product for heat exchange stations in urban central heating projects. It is suitable for water-water heat exchange systems, steam-water heat exchange systems and The domestic hot water supply system plays an important role in the rational distribution of heat energy and the improvement of thermal management.

In high-rise buildings, HVAC systems that use water, glycol, etc. as heat exchange media often have extremely high static pressure. Using titanium plate heat exchangers as pressure blockers can reduce the static pressure. Decomposed into several parts with smaller pressures, thereby reducing the pressure requirements of the system on pumps, valves, cold and hot water units and other equipment, saving equipment investment and operating costs. Plate heat exchangers are widely used for the heat exchange of chilled water in air conditioning systems. Installing a plate heat exchanger between the cooling tower and the condenser near the condenser can act as a condenser to prevent equipment corrosion or blockage, and can be used in Save the running time of the chiller during the transition season.

Because the tube sheet of the plate heat exchanger is corroded by moisture, cavitation and trace chemical media, leakage often occurs at the weld seam of the tube sheet, resulting in the mixing of water and chemical materials, the temperature of the production process is difficult to control, and other products are produced. Seriously affect product quality.

After the weld of the condenser tube sheet leaks, internal stress is likely to occur inside the tube sheet, causing leakage in other heat exchangers. Repeated repair welding and experiments require 2 to 4 people to repair it in a few days. After a few months of use Corrosion occurs again in the welds of the tube sheet, which brings waste of manpower, material and financial resources to the enterprise and increases production costs. Through the corrosion resistance and erosion resistance of the polymer composite material, and the protection of the new heat exchanger in advance, this not only effectively solves the welding seam and blisters problems of the new spiral plate heat exchanger, but also prevents chemical corrosion after use. The metal surface and welding points of the heat exchanger can also be coated with polymer composite materials to protect the metal during regular maintenance in the future; even if there is leakage after use, it can be repaired in time to avoid the impact of long-term surfacing maintenance produce.

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