Factors influencing the heat exchanger of the large air separation unit

In fact, reflux ratio is a conventional saying. In practical calculation, it is divided into liquid gas ratio in distillation section and gas-liquid ratio in stripping section. The minimum reflux ratio is of course the same. When the number of trays and reflux ratio determine the purity of distillation products, the actual meaning is that the gas-liquid ratio of the stripping section and the number of trays in the stripping section determi...

1. It is easy to produce air hole when the flux is wet 2. If the welding speed is too fast, it is easy to produce welding porosity 3. Welding gas hole caused by welding wire rust or oil stain 4. The welding seam has rust, oxide film, grease and other organic impurities, resulting in welding porosity 5. It is easy to produce air hole when welding with improper polarity 6. Welding porosity caused by flux contamination 7. Insufficient height of flux is easy to produce welding porosity 8. If the height of flux is too high, the gas is not easy to escape and the welding porosity is easy to be produced