Process Area Event – [I See Now-26] Solving Difficult Problems So Simply
Thread Content
The grate bars in coal-fired boilers often break for various reasons, and if there are too many broken ones, the boiler must be shut down for replacement. Due to frequent breaks in the grate bars, inspections must be carried out every time production is halted. This happens repeatedly; not only is it a time-consuming task, but more importantly, it doesn’t solve the problem. Once, while replacing the grate bars, I accidentally found that a broken one looked new. I picked it up to take a closer look, and it indeed was new. By comparing it with the old grate bars, I noticed that the holes in the new one were smaller than those in the old ones; that’s when I realized what the problem was. Each time a grate strip is replaced, only the broken one is swapped out with a new one; the entire row across is made up of old strips. When a new strip is installed, its holes are not worn out yet, so they are relatively smaller. As a result, this grate strip bears an extremely high load during operation, which can even cause the long pins to bend and eventually break. After discussion, it was decided to remove the entire row of grates and replace them with a new row; as for the old ones that were removed, those broken grates were discarded. In this way, the problem is completely solved; breaks in the grate bars occur very rarely. That’s all there is to it.
I see! ! ! I get it! ! !
How much is one grate strip? I guess when you make the change, some people will say you’re increasing costs. ;P
The grate bars that have been removed and not used up are not thrown away; they can be used again next time. Here’s a joke: When standardization was being implemented, the supervisor ordered that the old grate pieces that were stored in the tool room and tied up together be thrown away. The stove operator said they couldn’t be discarded, as they were valuable items. Since it’s a precious item, it needs to be kept hidden – so it was placed inside the packaging box of a pump. During the re-inspection, the supervisor asked if you had thrown away your precious item. After seeing it, they said it should be hidden under the bed for safety. Haha.
I thought it would be thrown away. What should be done next? Should we wait until the grating plates inside get old and then replace them all at once?
Yes, replace the old one; if a part is broken, replace it with that one. Relatively speaking, the size of the holes is more or less the same due to wear.
Oh, it doesn’t matter whether it’s new or old; as long as they’re more or less the same, that’s fine.
The losses caused by shutting down the furnace are greater than those resulting from issues with the grates; that’s why the owner replaces the entire unit at once, rather than replacing only the damaged parts as was done in the past
This also depends on communication skills; perhaps the leader has other considerations
Never mind, I don’t understand it; if I keep talking, it will just be nonsense. *nht1 is holding a big stick, while *lihuagong is leading a dog. . .