Wednesday, March 3, 2010

All in a Day's Work: New Tube Leak in Bottom Ash


Unit 2 has a tube leak in Bottom Ash. This is at the bottom of the furnace, underneath the 'floor'. The tubes form a sloped floor in the bottom of the furnace, and the heaviest ash falls down the walls, slides down the sloped floor and falls into a trough of water. From there it is extracted and pumped out to some decant ponds where the ash falls out of the slurry and the water is reclaimed and used to transport more ash.

This is a picture of Unit 1 Boiler furnace cavity, looking down from the 13th floor. The holes that you see on the sides of the boiler are burners, and when the boiler is operating, a jet of fire about 3 ft in diameter and 30 feet long shoot out of the burners. Our tube leak is down below the scaffolding that is being assembled in this picture.





You probably won't see a clip like this very often. It looks like fire shooting out, but it is just hot pressurized water flashing to steam, and illuminated by the fire above.

4 comments:

Mike said...

so are you wearing SCBA gear when you are in there? Or are you tethered in those confined spaces?

Wow! I love those videos. it is rare to see something like that. Thanks for taking the effort!

Julie said...

Wow, Dad! That is pretty cool. I love that video.

Thanks again for all the help!

Sailor said...

Actually, that clip was taken by one of our Maintenance bosses. They cut a little window in the steel above the ash water overflow trough and he stuck his hand in the hole and made the clip then sent it out to us so that we could see what was going on. We have had this kind of leak before, and have had pictures of it, but this was the first movie clip, and it turned out to be pretty good. He made several of these, and this was the best of the bunch.

Alian Acel said...

Actually, I was thinking that how the above picture was taken but I got the reply from above comment on Sailor. I have seen many pictures of boiler but this one is really rare to me.

AA@ boiler repair