Changing accident

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1. Water ingress into the shift converter: Slight moisture content in the process gas, when it enters the shift converter, causes the bed temperature to drop. The catalyst disintegrates upon contact with water, resulting in an increase in bed resistance and a decrease in the conversion rate. If severe, it can also cause a sharp drop in the bed temperature and flooding of the catalyst, leading to a catalyst temperature collapse accident that results in the shutdown of the conversion process. Accident handling: If the process gas contains a slight amount of water, the control room and the site personnel shall immediately check whether the liquid level in the inlet separator is normal, to ensure that the separator is operating within its proper range. If the bed temperature drops rapidly, falling below the temperature at which the catalyst remains active, and if there is significant water on the surface, an emergency shutdown should be initiated; the gas should be vented from the vaporizer in order to resolve the issue of water contamination. After the problem is resolved, the catalyst in r0901 needs to be re-processed with nitrogen to meet the required standards before gas can be introduced for operation. Precautionary measures: (1) The control room should closely monitor the liquid level in the inlet separator, and on-site level gauges should be used to verify this level. The liquid level alarm that appears on the central control system must be confirmed and addressed. (2) Closely monitor the inlet temperature and bed temperature of R0901; any temperature changes that occur must be analyzed carefully, without any negligence. (3) The gas equalization process must be carried out slowly; the control room should instruct the site to perform drainage by pouring from the lowest point.