Decarbonization regeneration
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In ammonia synthesis, after passing through the hydraulic turbine, the pressure of the rich liquid decreases! It is because the rich liquid converts pressure into kinetic energy to do work! However, the rich liquid does not pass through a hydraulic turbine; it only passes through valves C and D. Why then does the pressure of the rich liquid also decrease? What principle is used to reduce it? This post was last edited by zhangchaosen on 2008-1-19 21:10]
Because of the effect of resistance! This post was last edited by davidlzht on 2008-12-25 08:11]
In our system, the rich liquid has a pressure of around 2.6 MPa in the absorption tower; after passing through the valve, its pressure drops to around 0.4 MPa. I think it’s mainly the function of the valve; what we have here is a control valve, a pressure-reducing valve. Moreover, the diameter of the pipeline changes before and after the valve. Around the valve seat of the control valve are swirl holes; the rich liquid enters the valve body through these swirl holes and flows out once the valve core is opened. The larger diameter of the outlet pipe also provides cushioning, allowing pressure to be released. It’s my personal opinion; it may not be correct. I would appreciate some guidance from those who know more: lol :lol
In the decarburization process, the rich liquid should be regenerated under reduced pressure; this can be achieved by using valves to lower the pressure, with the pressure in the system downstream of the valves representing the regeneration pressure.
When the pressure is around 0.4 MPa after being reduced by the valve, how is it possible to push the fluid to the top of the regeneration tower, which is over 50 meters high?
This pressure remains stable at around 0.7 MP, with absolutely no fluctuations!
Basically agree; a self-regulating valve is essentially a throttle valve, through which the fluid expands as it passes through, converting potential energy into kinetic energy (which is the cause of erosion and corrosion of the valve). Vortices are generated, which in turn are converted into heat energy and lost. As for exactly how low the pressure should be reduced, it is determined by the pressure and head loss of the subsequent equipment, as well as the pipeline resistance, etc.
Friends on the 5th and 6th floors. The boiling liquid coming out of our absorption tower has a pressure of only 0.5 MPA after depressurization. And the pressure available is only 0.3MPA. It’s also been pressed onto the regeneration tower. The regeneration pressure is around 0.065~0.080 MPa. Same operation. Why is the stress different sometimes? ? ? I can’t figure it out
Upstairs, it’s probably a problem with the instruments; you should contact someone to calibrate them! Some time ago, unstable gas supply here caused large fluctuations in the system, so we operated pumps without turbines; after passing through valves C and D, the pressure was 0.5 MP! Now, it goes through the turbine. But the pressure is still around 0.5 MP! Under normal circumstances, it should be above 0.7MP! I think it’s a gauge issue! I didn’t bother with it either! Hehe! ·
0.4 MPa refers to the pressure of the rich liquid at the inlet to the regeneration tower; it is not the pressure after the pressure regulator. The pressure after the pressure regulator should be 0.9–1.0 MPa