What to do if there is a blockage on the slag breaker
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The blockage in the slag breaker is actually a blockage at the lower valve in the quenching chamber. Attempts were made to clear it using high-pressure ash water between the lock slag valve and the middle slag lock valve, but it still wouldn’t open. The flow rate at the outlet of the lock hopper circulation pump is around 60 cubic meters, and the slag breaker isn’t blocked yet. What could be the reason for this? Since there’s no slag left in the slag skimmer, what should be done?
If there is a blockage on the slag crusher, try reversing it several times and use the high-pressure nitrogen gas available at the bottom of the crusher to blow it out.
The temperature in the gasifier is low, and there are large pieces of slag inside; it’s planned to shut down the unit for cleaning – there’s no other solution. Problems will arise over time.
Generally, building a bridge on top of a slag breaker leads to a decrease in the flow rate of the circulating water in the lock hopper; so how is it still possible to achieve 60 cubic meters in your case? Could it be that it’s not a problem with the slag frame bridge, but rather an obstruction at the slag outlet?
Try reversing the slag breaker first; if that doesn’t work, use high-pressure nitrogen from above the slag breaker to blow it away. You can also use high-pressure ash water for backwashing. Act quickly, as things will get more complicated if delayed； It’s also possible that the slag outlet of the gasification furnace is blocked; in that case, illegal operations would be required to remove the slag, and great caution must be exercised! ! !
In fact, there are some methods that are not part of standard procedures but can solve certain common problems. In terms of that, the slag cannot descend; in physics terms, this means that the net upward force is equal to the weight of the slag, which prevents the slag from moving downward. The force here includes pressure. So can we understand that once there is a pressure difference above and below the slag, the pressure acting on each unit area will disrupt the overall balance? In this way, we can use the pressure applied from above and the pressure release from below to force the slag stuck on top of the slag breaker to fall. Unconventional operations can have some negative effects, such as the impact of excessive pressure differences on the equipment and on the manufacturing process. Therefore, when operating, one can only make appropriate adjustments at the initial stage of slag formation, or in other words, when there is only a slight amount of slag present. The inner layer of the slag tank can only withstand high temperatures but not high pressures; therefore, the liquid level in the slag tank should be kept at an appropriate height to minimize deformation of the tank. I hope it gives you some inspiration.