How to adjust the amount of ammonia used based on load?
Thread Content
In the air lift process, the load ranges from 23,000 to 23,500. To maintain an ammonia-to-carbon ratio between 2.9 and 3.2, it is necessary to determine how many tons of ammonia should be added per hour. How can this be calculated using formulas? And how can the production volume be determined based on the volume of gas used? . . . . . This post was last edited by lxq700918 on 2009-2-21 20:30.]
The load is 23,000, and the ammonia-to-carbon ratio is 2.9; therefore, 50.62 tons of ammonia should be added per hour. The load is 23,000, and the ammonia-to-carbon ratio is 3.2; therefore, 61.09 tons of ammonia should be added per hour. (I’m calculating CO2 as 100%, and for 23,000, there’s no unit specified; I’ve used cubic meters for that calculation.) ）
Here’s an empirical formula for you: “carbon dioxide multiplied by 2 plus 6”. For reference only. After making the initial adjustments, further fine-tuning will be necessary, and this will have to be done based on the various parameters of the high-pressure system. For example, a comprehensive assessment is required based on factors such as the temperature of the synthesis tower, the liquid output from the stripping tower, the temperature difference in the high-pressure washer, the high-pressure level, and the gas production volume of the high-pressure cooler; practical operational experience is very important in this regard.
Generally, the amount of carbon dioxide in cubic meters is divided by 1000, and then multiplied by 2.4 to determine the amount of liquid ammonia in cubic meters
Agree with what was said above, but it seems suitable for the CO2 stripping method; the value is higher for ammonia stripping!
Using this formula, it seems that liquid ammonia is used in larger quantities, right? What does this have to do with the purity of carbon dioxide? Is it proportional?
This is an empirical formula that needs to be adjusted according to changes in CO2 temperature, liquid ammonia density, system pressure, and temperature; it is not fixed. It is inevitable that liquid ammonia is used more frequently, as the ammonia-to-carbon ratio in various processes is always greater than 1; therefore, more liquid ammonia is needed.
Here is a basic formula: NH3/CO2 = 2.9–3.2. The molecular weights are NH3 = 17 and CO2 = 44. The volume of a gas at standard conditions for CO2 is 22.4. The density of NH3 at 20 degrees Celsius is approximately 0.580; the exact value can be found in tables, as density varies with temperature. The purity of CO2 is assumed to be 98.5%. Therefore, 23000 * 98.5% / 22.4 = CO2 in kilomoles. CO2 in kilomoles * 2.9–3.2 = NH3 in kilomoles. NH3 in kilomoles * 17 = weight of NH3 in kilograms. Weight of NH3 in kilograms / 0.580 = volume of NH3 in cubic meters. Is it clear? This is for reference only.
For a standard volume of 1000 cubic meters of CO2, add 2.4–2.5 cubic meters of ammonia; the ammonia-to-carbon ratio in this case is around 2.05 (MOL), which is suitable for CO2 stripping of urine. This method cannot be used for water-based urine
10# YHL512777 Of course