How can urea plants reduce CO2 consumption?
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In actual production, we pay more attention to ammonia, steam, and electricity consumption, while paying less attention to CO2 consumption. However, for urea plants that use natural gas as a raw material, due to the higher proportion of ammonia compared to carbon, more attention should also be paid to CO2 consumption. Let’s discuss: Do you pay attention to CO2 consumption? If of interest, how is its consumption reduced?
We don’t pay much attention to it; although it’s natural gas, we have enough CO2.
The load on the urea production plant is determined by the amount of carbon dioxide gas fed into the tower. In the urea production system, as long as no carbon dioxide gas is vented, carbon dioxide is essentially fed into the system, meaning there is no waste. There are likely very few companies that achieve savings in terms of process operation metrics alone, and this is not covered in many textbooks either. However, increasing the carbon dioxide conversion rate is a good way to save carbon dioxide gas at a certain production capacity.
Our factory has always paid attention to CO2 consumption, even though we also use gas-based processes. The control of CO2 consumption mainly focuses on the following aspects: 1. Whether there are any losses due to venting of CO2 gas or gases containing CO2 in the synthesis zone. 2. Control the loss of CO2 gas in the urea compression system: such as oil and water leakage, gas leakage, and packing leaks. 3. Minimize the CO2 content in the carbon-ammonia solution to prevent it from being carried away through the tail suction vent.
We don’t pay much attention to it; although it’s natural gas, we have enough CO2. Basically, all that matters is to ensure that no waste occurs when the CO2 compressor discharges oil and water.