Small air separation units workers check out the cold box aluminum instrumentation tube and instrumentation valve before the corrosion of the aluminum joint, the site identified the replacement of 33 new valves.
1 The original fine argon tower exhaust gas discharge pipe out of the cold box with vaporizer, vaporizer close to the cold box caused icing, the cold box plate corrosion serious. The small air separation unit overhaul team removed the carburettor and replaced it with a straight vertical tube discharge outside the box plate, the valve was moved out and installed, and the discharge pipe was raised and emptied after the valve to reduce the icing and corrosion of the cold box plate.
2 The original cold box inflatable used DN50 diameter pipe out of the cold box, air separation equipment workers changed to the cold box nitrogen. DN150 pipe was used. The original inflatable tube into the cold box at the bottom after a week around up to the upper middle, now another way to increase the DN25 inflatable tube, the tube into the top of the cold box after a week around down 20 meters.
3 The original lower tower liquid-air splitting tube running in the manual analysis room analysis of oxygen content of about 10%, while in the lower tower liquid-air level transmitter at the positive pressure tube analysis of oxygen content of 35-40%. The small air separation unit workers in the sand picking saw the sampling point is located in the lower tower liquid-air pipe out of the horizontal section directly above, now changed to the horizontal pipeline at 45 ° below the slope.
4 in the cold box to increase the three RTD led to the DCS, respectively located near the liquid product discharge valve, liquid air to go on the tower throttle valve near the fine argon tower evaporator liquid nitrogen outlet valve, to facilitate workers to find the leakage of liquid in the cold box.
Using intelligent large air separation units，small air separation units and liquid air separation plants instead of traditional manual production methods, combined with AI algorithms and machine learning advanced technology, compared with the traditional air separation industry production mode, DEAR's intelligent production line in large air separation units，small air separation units and liquid air separation plants, product quality and accuracy go further, and greatly improve the consistency of the product.
