What is the solution for initializing the pressure conditions of the carbon scrubber?
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In the GE coal water slurry gasification process, one of the initialization conditions is that the pressure at the outlet of the carbon scrubber must be less than 0.6 MPa (for a pressure rating of 6.5 MPA) or 0.4 MPa (for a pressure rating of 4.5 MPA). I’m not quite sure why this condition is required What is the main purpose?
Prevent excessive pressure difference between the upper and lower parts of the tray during material feeding, thereby avoiding damage to the internal components
There must be other reasons as well, right? The pressure difference before and after the tray, whether under pressure or not, should be the same!
Yeah, I don’t think it has much to do with the tray pressure difference. That master was willing to share his knowledge generously.
That is because when the pressure in the carbon scrubber is below 0.6 MPa, the feeding procedure defaults to a shutdown state; it is only when the vaporizer is also in a shutdown state that feeding is possible, following this principle. Of course, the minimum pressure value varies from factory to factory; some are below 0.3, while others are below 0.4
Material feeding is about to begin, and the carbon scrubber still has a pressure of 0.6 MP – there must be a problem with the flare system, or some other issue exists. With such pressure, there will definitely be problems when feeding the material; I agree with what was said above.
The outlet pressure of the carbon scrubber tower is required to be less than 0.6 MPa (for the 6.5 MPa pressure class) or 0.4 MPa (for the 4.0 MPa pressure class). I agree with the opinions of the teachers from floors 2 and 5; moreover, I think there are also requirements regarding the system after the pressure is changed.
It is mainly to ensure a certain pressure difference between the burner and the gasification furnace, so as to guarantee successful feeding into the gasification furnace.
If the pressure is 0.4 or 0.6, the feeding of the system is unstable; furthermore, this indicates a problem with the flare system, possibly due to blockages.
It should have little to do with the pressure difference between the upper and lower layers of the tray. I agree with what the teacher on floor 5 said; this carbon cleaning tower likely has bypass interlocks as well. It’s normal to feed materials into the system while it’s under pressure, and this is a well-established technique (subject to specific conditions). Perhaps it is related to the switching of the black water to the downstream system (0.6 MPa).
There is a theory now, which I think makes some sense: GE set this condition to prevent feeding under pressure. Because only when feeding material after the system has come to a stop (that is, continuous feeding) can this pressure exceed 0.6; during initial startup or when the temperature is raised again after discharge, this pressure does not exceed 0.6 at the initialization stage. Of course, having developed to this point, pressurized consecutive pouring is now quite mature, and what the teacher on the 10th floor said makes sense.