Method to judge whether NH3/CO2 and H20/CO2 are suitable
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Method to judge whether NH3/CO2 and H20/CO2 are suitable: In actual production, due to inaccurate analytical data or delayed reporting of analytical data, the operator can judge NH3/CO2 based on the indication of the thermocouple thermometer after the material enters the pre-distillation tower. If NH3/CO2 is 4.0, the temperature at this time is 115℃ ； When NH3/CO2 is less than 4.0, the temperature rises ； When NH3/CO2 is greater than 4.0, this temperature decreases. The level of H2O/CO2 is judged by the temperature difference between the top and bottom of the synthesis tower. Under the design production intensity, when H20/CO2 is 0.65, the temperature difference between the top and bottom is 6℃. If the production intensity increases, the temperature difference will increase. When H2O/CO2 rises, the temperature difference shrinks, because the temperature at the bottom of the tower rises and the temperature at the top of the tower drops, causing the temperature difference to shrink. When H2O/CO2 is 0.85, there is no temperature difference. It is also necessary to pay attention to the temperature distribution at three points of the synthesis tower and consider the adjustment comprehensively. This post was last edited by qiwu9981 on 2009-3-9 10:18 ]
But in fact, when the N/C ratio of the 35-square-meter urine tower in our factory is 4.0, the temperature measurement points of the urine tower after decompression are not 115°C. I am very puzzled. If the temperature is forcibly lowered to 115 in actual production, it will obviously feel that there is too much ammonia in the urine tower, the temperature of the urine tower will be difficult to maintain, and the medium-pressure decomposition and recovery load will be heavy. Never knew how to explain it.