Air separation plant supplier

Users reported that the on-line analyzer of a 30000 grade air separation plant showed that the outlet CO₂of the molecular sieve suddenly increased from the normal value of 0.43×10-6 to 120×10-6, and the temperature difference in the expansion air channel entering the two high-pressure plate fin heat exchangers began to expand. At the same time, the temperature in front of expander also decreased from - 105°C to - 132°C with liquid entrainment. After receiving the user's notice, DEAR air separation sent technical personnel to the site for observation and detection. It was found that the location of the self-cleaning filter of the equipment was close to the chemical boundary area. When the wind direction was in the downwind direction of the chemical industry boundary area, the phenomenon that the concentration of CO₂ in the air at the inlet of the self-cleaning filter of the air compressor exceeded the standard. In view of this phenomenon, the following opinions are given: 1. Sh

During the start-up phase, when the liquid volume accumulates in the condensing evaporator, the gas and liquid mixture will pass through the liquid air and liquid nitrogen throttle valves. When the throttle valve begins to close, due to the large opening of the valve, when the amount of gas and liquid mixture from the lower column to the upper column changes little, and the pressure of the lower column does not increase significantly, it means that the temperature difference of the condensing evaporator has not increased. At this time, the condensing evaporator and the surrounding insulation have been cooled to the low temperature required by the liquid accumulation stage. Due to a large amount of cold production and a large amount of gas liquefaction, the liquid evaporation in the condensing evaporator is also increased. The rising steam produced prevents the flow of liquid from the sieve plate hole, and gradually accumulates liquid on the tray, so the liquid level will drop. In ad