Manufacturing process of all-welded plate heat exchangers

Source: 　 Time: 2020-12-04 18:45:08　Hit:

The all-welded plate heat exchanger connects all the plates by welding, replacing the rubber sealing gasket in the traditional plate heat exchanger, preventing the gasket from deforming and failing at high temperatures and causing medium leakage. Therefore, the welding process is the key and difficult point in the all-welded plate heat exchanger.

When the two plates are welded by the wing edge, the heat dissipation of the stainless steel sheet is slow, the temperature is high, and oxidation is easy to occur. Therefore, while welding, an argon groove protection device should be installed at the back welding seam. A small amount of argon gas is passed through, which greatly improves the protection effect, avoids serious oxidation behind the weld, and makes the front and back sides of the weld appear gold. Yellow, the realization of single-sided welding and double-sided forming.      

In the core welding of the fully welded plate heat exchanger, fully automatic core argon arc welding is used. If the welding speed is too fast, the gas protection effect is not good, and the weld metal is easily oxidized; if the welding speed is too slow, defects such as undercut burning may occur. Therefore, during the welding process, the arc should be short and the welding speed should be kept uniform, so that the upper and lower plates can be well fused.

The plate structure design of the fully welded plate heat exchanger is reasonable, so that the heat transfer and fluid resistance characteristics are matched reasonably, so the heat transfer efficiency is high, the pressure is reduced, and the overall performance is better, eliminating the shell-and-tube heat exchanger and the detachable plate heat exchanger. The dead zone phenomenon of the heater. Adopting the peripheral group welding plate bundle form, eliminating the sealing gasket, so the heat resistance and pressure resistance performance are better than the detachable plate heat exchanger. The plate is a modular structure, and the flow form and flow channel area can be changed according to different process requirements. 

The all-welded plate heat exchanger is suitable for heat exchange occasions with high heat transfer efficiency, compact structure and small pressure drop. The most ideal equipment to replace shell and tube heat exchangers in special heat exchange processes.If you want to learn more about all-welded plate heat exchangers, welcome to Yojo website, and we look forward to your call!

Tag：all-welded plate heat exchangers；Yojo's plate heat exchanger；plate heat exchangers manufacturing process

• Previous：Plate heat exchanger parts and services
• Next：Common failures and treatment methods of plate heat exchanger