Energy recovery issues from the high-pressure circle to the low-pressure circle of the urea unit
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At present, in all large-scale urea plants, the discharge from the high-pressure system seems to be directly decompressed to the medium-pressure or low-pressure system through a regulating valve. Why is it not designed to decompress and recover energy through a hydraulic turbine? Is it because the equipment is difficult to manufacture? Or is it difficult to design the system? Interested Sichuan friends can discuss this strange subject.
In the urea plant, decompression is a separation method. I am not sure what the poster means, but there are many kinds of energy, but in terms of thermal energy, it is not much, because the heat of separation after decompression is not enough, and external steam heating is needed.； If we talk about kinetic energy, don't worry about it, because in the urea system, the faster the speed, the better the quality of the product can be guaranteed, while the slow speed and long residence time are conducive to the formation of biuret. If equipment is used to recover energy, the material requirements for the equipment are high and may not be cost-effective, so it is not used. purely personal opinion
LZ's idea is very good. It would be quite impressive if this part of the energy could be recovered! ! This is also an innovation in the urea process. I am paying attention to it, but is it feasible to use a gasification turbine? Can you introduce the hydraulic turbine LZ?
LZ’s idea is very good. It would be quite impressive if we could recover this energy! :victory: :victory:
Regarding energy recovery, I mainly refer to the recovery of the potential energy of the high-pressure medium. Similar to the decarbonization system of the ammonia plant, the rich liquid in the CO2 absorption tower is decompressed by the turbine and then enters the regeneration tower. The turbine is also used to drive the lean liquid pump, which greatly reduces the power consumption of the lean liquid pump.
This post was last posted by * Edited by aojiaoya0546 on 2015-9-10 11:57 Hello everyone! Regarding the CO2 energy recovery device, we provide an overall system solution with high efficiency and good economic benefits. The main equipment is different from the screw and reciprocating compressors currently on the market, which have shortcomings such as low efficiency and heavy maintenance. Interested friends can send me a private message.