How to adjust the amount of ammonia in a suction tower?
Thread Content
In actual production, how to adjust the amount of ammonia added to the first absorption tower? This post was last edited by lxq700918 on 2009-3-28 21:40 ]
Adjust the amount of ammonia water according to the size of the load. In terms of indicators, it is mainly to control the air outlet temperature and bottom temperature of the first suction tower within the indicator range. If too much ammonia is added, the liquid level in the first suction tower will be high, making operation difficult. There is less ammonia and the absorption effect is not good. The poster should explain your production load and equipment capabilities so that everyone can answer in a targeted manner.
Combined with the load, the concentration of ammonia and the temperature of the fine washing section of the first suction tower, a comprehensive judgment is made and then adjustments are made.
The main functions of ammonia are:: 1. Ensure that most of the ammonia in the tail gas of the medium-pressure ammonia cooling system can be washed and absorbed to minimize the absorption load of the tail absorption tower. 2. Ensure that the amount of CO2 in the fine cleaning section of the first absorption tower can be reduced to less than 50 ppm to prevent CO2 from flowing up to the medium-pressure ammonia cooling system. This is also the most important control principle. To meet the above conditions, adjustments are mainly made according to the system. In special circumstances, such as system fluctuations, adjustments are mainly made according to the above 2 items, especially item 2. In short, on the premise of ensuring the above two items, the less ammonia water, the better.
The amount of ammonia water is mainly adjusted according to the reaction conditions of the synthesis tower and the temperature of the first-stage absorption tower.