How to utilize low-pressure rich steam?
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How to utilize the low-pressure surplus steam from urea strippers? If a new urea production plant using the carbon dioxide stripping method with an annual output of 400,000 tons is located too far away from the ammonia synthesis area, and the compressors are reciprocating types, then the excess steam, due to its low pressure, cannot be delivered to the ammonia synthesis plant and must be recycled. If the conditions at the site where this steam is vented are unfavorable, then circulating cooling water is used to condense and recover the condensed water. The utilization of energy in such cases is not entirely efficient; for example, could the excess low-pressure steam be used to drive wastewater pumps or to transfer superheated steam outside the facility? It is understood that some manufacturers simply vent the gas into the atmosphere. Welcome, fellow enthusiasts, to discuss this topic!
1\ Preheat the urea desorption solution; 2\ Preheat the steam condensate before sending it out, etc.
It is best to use it for ammonia synthesis gas production; if that’s not possible, it can be used in lithium bromide refrigeration to produce chilled water, which is then used to cool the semi-water gas in ammonia synthesis.
Actually, it’s best to dissipate the heat on the spot. However, the method used on the second floor still fails to resolve the problem of excess steam, as the overall heat balance remains unchanged. My recommendation: Purchase small steam turbines to replace motor-driven centrifugal pumps. They are mainly used in pump setups where there is one operating pump and one standby pump—one driven by an electric motor and the other by a steam turbine. This way, excess steam can be utilized, saving power consumption.
It is recommended to use lithium bromide refrigeration to produce cooling water for cooling various cooling media.
Heat the liquid-phase material exiting the stripper to decompose methylamine