In the CO2 stripping method, the diversion of CO2 gas.
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In the CO2 stripping process, the CO2 gas is split: one portion goes to the stripping tower while another portion goes to the synthesis tower. Which manufacturer does such a thing? What is the main function of CO2 shunting?
Traditional CO2 stripping processes do not divide the flow in this way. It should be new technology for renovation. It is unclear why CO2 is diverted to the synthesis tower Is this the normal course of production?
This is still theoretical; a small amount of CO2 is directly introduced into the synthesis tower in order to maintain its self-heating balance, as most of the urea synthesis takes place in the batch condenser.
Reply to 2# htcfkq: Change full circulation of aqueous solution to CO2 stripping.
What was said on the 3rd floor is correct, but this is no longer just theoretical; several companies in China are already using it.
If some of the CO2 is sent directly to the synthesis tower, will it affect the stripping efficiency of the stripping tower? Furthermore, in the high-pressure ammonium methanate condenser, the ammonia-to-carbon ratio increases, resulting in a higher pressure at the same condensation temperature. How to solve this? Should liquid ammonia also be diverted?
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The principle is the same as that of conventional stripping; conventional stripping controls the high-pressure ammonium methoxide condenser so that it does not over-condense, with the aim of retaining some CO2 in the urea tower for reaction and maintaining the self-heating balance of the urea tower.
This post was last edited by Xieshui on 2010-9-20 09:25. For the process you mentioned, there are facilities for online production in China; CNPC has such facilities, with a production capacity of 2,700 tons per day.
Regarding this process, how is the ammonia-to-carbon ratio in the high-pressure ammonium methanate condenser controlled? What is the typical value of the ammonia-to-carbon ratio in the urea synthesis tower? Those who have detailed knowledge on this topic could please provide some information. Furthermore, what are the advantages of this process over the traditional carbon dioxide stripping process?