Level of CO2 consumption by urea
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In urea production, people tend to be more concerned about ammonia consumption, steam consumption, and electricity consumption, while paying less attention to CO2 consumption. Today, I ask our colleagues to share information on the CO2 consumption of our plant’s urea production unit, so that everyone can benefit from it. Please reply in the following format; thank you for your cooperation: 1. Urea process: Is it an aqueous solution, or CO2 stripping, etc.? 2. Plant scale: Under normal conditions, what is the daily production volume? 3. CO2 compressor type: Is it reciprocating or centrifugal? 4. CO2 consumption: How many kilograms of CO2 are consumed per ton of urea?
1. Urea process: CO2 stripping. 2. Plant scale: Under normal conditions, the daily production capacity is 1,420 tons? 3. CO2 compressor type: Reciprocating 4M25. 4. CO2 consumption: How many kilograms of CO2 are consumed per ton of urea? We do not count carbon dioxide consumption; we only calculate liquid ammonia consumption. This post was last edited by Durian on 2009-2-15 11:21]
Urea process: Aqueous solution; Plant scale: 500 tons per day of urea production; CO2 compressor type: Reciprocating; CO2 consumption: 408 Nm3 per ton of urea produced
1. Urea production process: CO2 stripping is used. 2. Plant scale: Under normal conditions, the daily production volume is around 1,250 tons. 3. Type of CO2 compressor: Reciprocating type. 4. CO2 consumption: 403 Nm3 per ton of urea produced
Urea process: Aqueous solution; Plant scale: 1,000 tons per day of CO2; Type of CO2 compressor: Reciprocating; CO2 consumption: 850 Nm3 per ton of urea consumed
1. Urea production process: Carbon dioxide stripping method. 2. Plant capacity: 1,000 tons per day. 3. Compressor: 4M40. 4. Carbon dioxide consumption: Theoretical value is 374 Nm³. Actual production consumption does not take carbon dioxide consumption into account. However, the ratio used in operation is much higher than the theoretical value; for the 4M40 compressor, 10,500 units of gas are used, based on a daily production of 600 tons of urea
Add the units for the data provided above: the compressor capacity of 10,500 Nm³/h corresponds to a daily urea production of 600 tons； This translates to 420 Nm³ of carbon dioxide consumed per ton of urea
1. Urea process: Toyo Company’s ACES process； 2. Plant scale: Under normal conditions, the daily production is around 360 tons ； 3. CO2 compressor type: Reciprocating compressor ； 4. CO2 consumption: 411 Nm3 per ton of urea consumed.
1. Urea process: CO2 stripping. 2. Plant scale: Under normal conditions, the daily production capacity is 1000 tons? 3. CO2 compressor type: Reciprocating, 4M32. 4. CO2 consumption: 400 Nm3 per ton of urea consumed
Urea process: CO2 stripping method. Plant capacity: 1750 t/d. Compressor: steam turbine centrifugal compressor. CO2 consumption: 380 Nm3/t
1. Urea process: It is the ACES process technology of Japan’s Toyo Company； 2. Plant scale: Under normal conditions, the daily production capacity is 330 tons ； 3. The CO2 compressor type is reciprocating ； 4. CO2 consumption: Approximately 398 Nm3 per ton of urea.
From the introductions by those upstairs, it can be seen that when reciprocating compressors are used, the CO2 consumption is somewhat high. One of the residents on the 12th floor uses a centrifugal compressor, which results in lower consumption; does that mean devices using centrifugal compressors all have lower consumption? We would appreciate more participation from those using centrifugal compressors; could you please provide information on your CO2 consumption?
I have a manufacturing plant in Shanxi with the capacity of 1,830 tons per day: 1. Urea production process: full-circulation water solution method. 2. Plant scale: under normal conditions, the daily output is around 900 tons. 3. Type of CO2 compressor: steam turbine type (centrifugal). 4. CO2 consumption: 395 Nm3 per ton of urea produced
Let’s discuss this with the pastoralist moderator: It is understood that the characteristic of centrifugal compressors is their ability to handle large flow rates. If the flow rate is too low, both the final impeller and the width of its airflow channels must be made very small, which makes processing difficult and significantly reduces efficiency. Therefore, under normal circumstances, when the gas flow rate is low, centrifugal compressors are not chosen; instead, reciprocating compressors are selected. Based on the information I have, centrifugal systems are only considered for urea production capacities of 1,000 tons or more (abroad, they are generally only considered for capacities below 1,500 tons). It was adopted for a production capacity of 900 tons; I’m not sure which company in Shanxi it is Who manufactured its centrifugal CO2 machine?
You’re right! It’s difficult to specify the manufacturer here; it produces 900 tons of urea per day, but the performance is not good. It’s noisy and has high power consumption.
May I ask why the ammonia consumption in the full-circulation aqueous solution method is generally higher than that in the stripping method?