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Prevention of water ingress into the adsorption tower and measures for dealing with it when water does enter. I. Forms of water ingress and their hazards: During the start-up and shutdown of the decarburization process, water can easily flow from the main carbonization tower and the fixed auxiliary tower (Tower No. 3) into the adsorption tower. The water from the former enters the adsorption tower through a steam-water separator at the bottom of the tower, while that from the latter enters directly at the top of the tower. During normal production, water ingress into the adsorbent can also occur due to untimely discharge of condensate water when changing shifts, or due to delayed drainage from the decarburization gas-water separator and inlet pipes. If the method of starting and stopping the vacuum pump is incorrect, the negative pressure tower will also draw water back into the adsorption tower through pipeline #7. Soaking the adsorbent in water causes it to permanently lose its adsorption capacity and cannot be regenerated. Ammonia water introduced into the adsorption tower may react with CO2 inside the tower to form crystals that clog the system. II. Preventing water from entering the adsorption tower: a) During normal operation, regularly monitor the liquid level in the steam-water separator, and drain the water accumulated in the steam-water separator and inlet pipes on schedule; if necessary, increase the frequency of drainage. b) When driving, the inlet and outlet valves should be opened slowly to gradually increase pressure. Prevent excessive pressurization from causing carbonized gas to flow back and thereby introducing ammonia into the system. c) After opening the inlet valve each time while driving, the steam-water separator and the inlet pipeline must be drained once. Start with the inlet first and then the outlet, ensuring that the inlet flow is greater than the outlet flow (the manual valve for pre-recycling the outlet also falls under this category). d) In the event of a significant reduction in production or an abrupt shutdown, the flow rate should be reduced appropriately; generally, for every two units whose decarburization outlet flow rate is reduced, the flow rate is decreased by 3000 M³/N. Adjustments should be made until the operation of the added and removed units stabilizes, after which normal regulation can be resumed. In the event of a sudden stop or a tripping of the compressor, the decarburization system must be stopped immediately, and the inlet and outlet valves (or flow control valves) of this system should be closed to prevent backflow of gas and liquid caused by excessive return gas from the second stage of the compressor. e) In the event that gas leakage occurs simultaneously in one or multiple towers of this system, as well as in valves 1#, 2#, and 7#, the system must be stopped immediately and the main inlet and outlet valves closed, to prevent carbonized gas and liquid from flowing back into the system due to the direct release of gas through valves 1#, 2#, and 7#. f) The correct operating procedures for the vacuum pump; take effective measures promptly if the vacuum pump trips to prevent water from entering the negative pressure tower. III. Criteria for determining the presence of water: 1. A large amount of water is discharged from the steam-water separator or inlet pipe, and water is also being discharged from the tower where adsorption is taking place. 2. There is an ammonia smell inside the outlet pipe (it is rare for water to be present at the outlet; this usually occurs when the gas production volume is low or under other special conditions). 3. The vacuum pump tripped, but the pump inlet valve was not closed in a timely manner, or there were obvious signs of water backflow at the pump inlet. IV. Treatment methods after water entry: 1. Shut down the system (keep the oil pump running), close the inlet and outlet valves, and activate the steam-water separator, the inlet pipe, as well as the drain systems of the three adsorption towers. 2. Once the system contains almost no water, start the vacuum pump to evacuate the tower containing water for several hours, continuing until no water vapor is present in the evacuated gas. 3. Turn off the cooling water for the transformed gas to increase the temperature of the material entering the adsorption tower, thereby preventing crystallization from blocking the system. 4. After evacuating and desorbing the other towers, gradually introduce air in increasing amounts to resume production. It is hoped that all operators involved in the decarburization process will observe carefully, summarize thoroughly, and apply their knowledge flexibly, in order to prevent various accidents such as water contamination from occurring at the decarburization station. This post was last edited by ZZJJAA70 on 2009-3-27 20:59.]