Pipeline blockage due to Texaco technology
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After each shutdown of the furnace, the pipelines of the gasification furnace that is shut down are flushed, and a large amount of sludge-like debris is removed. What is the reason for this? The pipelines were already flushed before the shutdown. What methods does everyone use to deal with pipeline blockages each time?
I don’t understand what the original poster means – is it the coal slurry pipeline that’s blocked or some other pipeline? I also don’t know how to flush the pipelines before shutting down the system
Please let the original poster know which specific pipeline is blocked
Do I need to rinse it after parking? It’s the coal slurry pipeline, right?
It needs to be flushed after parking; a lot of blockages come out from the carbon scrubber tower, and the pump that supplies water to the quench ring is prone to getting clogged
During normal operation, the carbon scrubber accumulates a lot of sludge, which cannot be completely removed by short periods of flushing; however, flushing is still necessary.
In fact, it’s not necessarily necessary to wash the tank after parking it; simply allowing the system to operate normally for a while will suffice. This will enable the gasification furnace to cool down naturally, and more of the black water can be processed in the flasher. In reality, however, such a practice is not adopted for reasons related to efficiency
The phenomenon mentioned by the original poster is of course true... When parking, it’s necessary to relieve pressure from the system as well as control the liquid level; sometimes the pipes get clogged again. The same is true when driving. This post was last edited by Langtaosha on 2008-3-14 at 11:16
I feel that no matter where the blockage occurs, there are usually just a few possible causes: 1. The coal slurry feed pipeline (make sure to flush it during startup and shutdown; it involves coal powder plus additives). 2. The process pipelines (professional analysis of scale formation can be carried out, an appropriate pH level should be maintained, flocculants should be added in suitable amounts, and the turbidity of the circulating process water needs to be controlled). 3. Ensure normal flow rates of flushing fluids or backwashing air for all equipment and instruments; after the system pressure reaches normal levels, check the flushing flow rates at various points.