What is the role of the liquefier in the DEAR Liquid air separation unit and why is it possible to self-balance the temperature of the return flow outlet?

According to the structural characteristics of the valve casing castings, generally take X-rays or γ-rays as a source of radiation with the technical measures of the way the valve body pressure-bearing parts for radiation detection. The use of radiation detection technology to detect the valve body pressure parts, you can find internal defects in the casting, to avoid casting defects may lead to valve leakage and lead to deflagration or explosion accidents. X-ray inspection is often used...

Fluid resistance refers to the pressure drop of fluid flowing through pipes, valves or equipment. The actual process pressure gradually decreased. In order to ensure the final pressure required by the process, a pressure source (gas compressor or pump) is needed to provide higher pressure, that is, more energy is consumed. Therefore, the amount of resistance reflects the amount of energy loss. In oxygen production, flow resistance is also closely related to the production process. For example, the resistance measurement of switching heat exchanger is the basis to judge whether self-cleaning is good. If the resistance of the distillation column is too large, the normal distillation conditions will be destroyed. The magnitude of resistance (i.e. energy loss) can be expressed by the pressure drop before and after the fluid flows through the vessel. For example, the gauge pressure at the bottom of the tower is 0.038 MPa, the gauge pressure at the top of the tower is 0.025 MPa, and the p