Problems with the agitator in the coal slurry tank
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This post was last edited by pyp222 on 2017-8-16 at 17:42. During the production process, the mixer may fail to operate due to faults in the mixer blades, motor, reducer, etc. At this point, the liquid level is lowered, and the high-pressure slurry pump of the standby system starts to circulate the slurry; will the quality of this slurry be sufficient for production? If both systems are operating simultaneously, how should this situation be handled? Are there any appropriate methods to prevent failures from affecting production? Some say to use bubbling combined with a pumping cycle; can simply bubbling ensure stable quality? Has anyone implemented any technical upgrades similar to those for the coal slurry tank? How do you handle problems when they arise?
The last edit to this post was made by pyp222 on 2017-8-16 at 21:47. To be honest, if there’s a problem with the mixer in the slurry tank, the best course of action is to fix it as soon as possible. The mixer should not be stopped for too long; once that happens, neither bubbling nor circulation is very effective – it may not achieve the same results as when the mixer is in use, and it also does not reduce operational risks
In other words, if emergency repairs can’t be carried out in the short term, the only option is to suspend operations?
Yes, that’s exactly what it means. If the repair cannot be completed within 4 hours, then close monitoring of the operation is necessary. The items to be monitored are the slurry pump and the temperatures at the top and bottom of the slurry tank. If the difference between these two temperatures becomes significantly larger than normal, it indicates that stratification and caking may have occurred below
Our slurry tank level shutdown interlock is set at 19.8%, with the normal range being 55~80%. Personally, I think that in order to ensure production, reducing the level to around 40% and having the two high-pressure slurry pumps designated for backup operate at full capacity, with a circulation volume of at least 40 cubic meters, should also be sufficient to maintain relative stability in the quality of the coal slurry. If bubbles are added, the effects of the two will combine, and it is presumed that this will suffice for continuous production after a failure. I think that if this method works, it can be used as an emergency solution in case of failures, and even during maintenance periods, to maintain continuous productivity. Which company offers flexible working hours to allow for continuous experiments based on the size of its own slurry tanks and the processing capacity of its high-pressure slurry pumps, so as to adjust or make judgments by analyzing the quality of the slurry. For rapid repairs, operations are determined based on the temperature of the slurry tank, the operating parameters of the slurry pump, and the pressure difference at the burner.
I agree with you; your idea can be used as an emergency plan. It’s worth giving it a try – after all, no one will know if it works or not unless they try it.
Theoretically, it is feasible, but it is necessary to consider that the inlet for the slurry circulation is at a fixed location, as is the bubbling plate; this makes it impossible to cover the entire slurry tank. How can dead zones be avoided?
A dead zone is bound to exist, and bubbling cannot occur on a large scale; moreover, it is necessary to ensure that no gas can enter at the pump’s discharge port. Bubbling disturbs the coal slurry and creates relative flow, which works in conjunction with circulation. I wonder what everyone’s immediate response was once the failure occurred. As a means of communication and discussion
Are you a large coal slurry tank? If not, all the coal slurry can be diverted to another tank to maintain production, while the problematic tank is repaired urgently.