Daily Question in the Synthetic Ammonia Process Exchange Area
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Dear forum members, in accordance with the guidelines of the forum and with the approval of the moderators, this section will launch a \"question of the day\" and a \"question of the week\" activity starting today. We encourage all members to participate actively, and the moderators will assign scores as required by the forum. The content of this activity is taken from \"Fertilizer Production Operator\". True or False: 1. Ammonia is not allowed to be present in the hydrogen returning gas before the cobalt-molybdenum hydrogenator. （ ） 2. A zinc oxide catalyst cannot be used once its sulfur content exceeds the acceptable level. ( ) 3. If the pH level of the boiler water is excessively low, an appropriate amount of NaOH can be added to adjust it. （ ） 4. The higher the temperature of the high-pressure steam, the better. （ ） 5. The exhaust gas from the high-voltage converter contains trace amounts of ammonia. （ ） 1. (×), 2. (×), 3. (√), 4. (×), 5. (√).
One question per day, great, let’s learn!*learn!*
1. The hydrogen returning to the cobalt-molybdenum hydrogenator must be free of ammonia. (×) 2. A zinc oxide catalyst cannot be used anymore once its sulfur content exceeds the allowable limit. (×) 3. If the pH level of the boiler water is excessively low, an appropriate amount of NaOH can be added to adjust it. ( √ ) 4. The higher the temperature of the high-pressure steam, the better. (×) 5. Trace amounts of ammonia are present in the exhaust gas from the high-voltage transformer. ( √ )
1、Wrong 2、Right 3、Right 4、Wrong 5、Right
The higher the temperature of the high-pressure steam, the better. ? ? ?
1. (×), 2. (×), 3. (√), 4. (×), 5. (√)
This post was last edited by ZZJJAA70 on 2010-10-29 at 12:30. 1. × 2. × 3. √ 4. × 5 √