Decarbonization rich liquid pressure problem
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Decarburization uses hot potash solution. The pressure of the absorption tower is 2.60MPA. The rich liquid exiting the bottom of the absorption tower has a pressure of about 0.3~0.6MPA after being decompressed by the regulating valve. The regulating valve line has a certain opening. The opening of the regulating valve is around 60%, and automatic adjustment is very stable. The pressure of the regeneration tower fluctuates very little around 0.07MPA. Question 1: Last year, the pressure of our rich liquid after decompression was 0.5MPA and stable. Why is our driving pressure at 0.3MPA this year? Stable and not volatile. Question 2: Some people say that the rich liquid pressure is too low by 0.7MPA and cannot pressurize the regeneration tower. But even if we don’t have enough pressure, we are still under pressure. Why? ? What exactly should this design pressure be? Hope to get the answer~~~Thank you:handshake:handshake:handshake:handshake
The design pressure here depends on factors such as the height of the regeneration tower and the pipe resistance of the pipeline. Generally speaking, after the basic conditions are determined, the pressure of the rich liquid is also determined. It is recommended to check the outlet pressure gauge. The pressure guiding tube may be partially blocked by crystals. This post was last edited by bigguard on 2008-1-19 16:58 ]
In fact, this question is not difficult. 1. When the rich liquid is decompressed by the regulating valve, the pressure drops and a large part of the CO2 has been regenerated. The specific gravity of the solution is much lower than that of the rich liquid and lower than that of water, so there is no need for such a large static pressure head. 2. The flow rate here is large, and part of the kinetic energy is converted into static pressure energy, so the solution can press onto the regeneration tower. As for the high and low pressure, it is related to the regeneration effect of the regulating valve after decompression. I wonder if you have noticed that when cleaning with hot water (more than 20% smaller than the specific gravity of the rich liquid) after overhaul, the pressure here is higher than usual. This is the reason. I don’t know if that makes sense, please correct me. This post was last edited by tmny1 on 2008-1-19 20:54 ]
With such a high pressure difference, is the flow rate high? Designing a hydraulic turbine is very energy-saving!
The second-generation turbine booster pump we use runs at a stable temperature and saves 60% of energy. It is very good, but it is a bit expensive. Which company's product are you using? How is the effect? Please introduce the following!
Which master has hot potash alkali pressure swing regeneration decarburization operating procedures and job training questions?
1. In fact, the pressure behind the valve is only related to the pipeline condition (resistance such as pipe diameter and thickness) and the fluid condition (fluid properties, flow rate, etc.). 3# is very detailed, I admire it! 2. For the W800 turbine used by our company, in actual use, the parallel self-regulating valve still has a certain opening, and the current of the turbine pump is only reduced by 1/3.
Is the efficiency so high? When inspecting a 200,000-ton ammonia synthesis plant in a certain factory, the lean liquid and semi-lean liquid added to the decarbonization tower were 86 tons and 765 tons respectively (the volume and tonnage after absorbing CO2 are unknown). The driving hydraulic turbine can transport 350 tons of semi-lean liquid. How to calculate the efficiency? Our factory is currently selecting a hydraulic turbine. Please tell your turbine manufacturer. You can also send a text message to your factory for inspection. This post was last edited by tmny1 on 2008-7-1 11:13 ]
Oh, is the W800 a dual drive turbine?
The turbine is connected to the pump via an automatic coupling (very expensive) and the other side of the pump is connected to the motor. When the turbine inlet valve is closed and the turbine stops, the coupling automatically disengages and can be driven by the motor alone.
Today, I communicated with the design unit and hydraulic turbine manufacturer and learned that generally in this case, CO2 decomposes and the gasification pressure is 0.43MPa. This may be the reason why the pressure here is around 0.43MPa.
If it is abnormal, you can check whether the pressure gauge is accurate.
0.3MPa is enough. This is the pressure head when the hydraulic turbine is turned on. The 0.7MPa you mentioned is because of the pressure after the regulating valve is decompressed. Generally speaking, the regulating valve can carry 80% of the rich liquid and the auxiliary line can carry 20%.
Is there any operational data on the 13th floor? Another question I would like to ask is, except that the flow rate of rich liquid is equal to lean liquid + semi-lean liquid, how much does the volume increase after absorbing CO2? Does your rich liquid have flow rate? This post was last edited by tmny1 on 2008-9-27 16:43 ]
How much does the volume increase without a rich liquid flow meter? Never thought about it. Generally, when the working conditions are stable, all the rich liquid enters the regeneration tower after the hydraulic turbine performs work. The hydraulic turbine auxiliary line fluctuates when the system load is mainly the front-end transfer load, or the steam fluctuation causes the synthetic compressor turbine speed to fluctuate and the decarburization back pressure fluctuates. The liquid level of the absorption tower fluctuates. Generally, the opening of the hydraulic turbine auxiliary line is within 5%, so the volume flow rate is a bit difficult to calculate.