help with belt conveyor cooling system
help with belt conveyor cooling system
(OP)
Hi,
I a have some conveyors that carry very hot iron pellets. They use water to cool the belt conveyor and that create steam every where in the galleries. Is there an other way to cool the belt conveyo?
Thanks!
JP.
I a have some conveyors that carry very hot iron pellets. They use water to cool the belt conveyor and that create steam every where in the galleries. Is there an other way to cool the belt conveyo?
Thanks!
JP.





RE: help with belt conveyor cooling system
RE: help with belt conveyor cooling system
RE: help with belt conveyor cooling system
How hot is "very hot"?
How big are the pellets?
What kind of belting are you talking about?
Do you have to use belted conveyors?
I have some ideas but you need to be more specific.
RE: help with belt conveyor cooling system
the pellets are 1/2'' diameter and between 300-400 deg F
the belted conveyors are already in place and it will be to expenses to change them..then i have to find a way to aspire this steam or eliminate it or decrease the temperature of the pellets before they go on the belt and after in the galleries because that create corrosion in the galleries and create moisture into the dust collector ducts
RE: help with belt conveyor cooling system
Step 2 is to calculate how much heat you actually need to remove.
Practically speaking, your options are air and water.
It is possible that using either more water, or colder water will do the job. Remove all the heat from the conveyor as a sensible heat gain only in the water - no phase change, no steam.
Or, do your cooling within a controlled enclosure that the belt passes through. Exhaust the steamy air outside. Use air knifes on the entry and exit.
RE: help with belt conveyor cooling system
Or since the pellets are getting cooled by the belt coolant, why don't you just quench them and convey cool pellets.
Are you trying to keep the heat in the pellets? Is this a troughed belt conveyor? Give us an idea of material loading in lb/min and belt speed.
RE: help with belt conveyor cooling system
the average speed of the belt is 300 fpm and the loading is about 625 ton/hr
in the past, they sprayed pellets with water into the chute and aspire steam in the galleries with fans..i think that was not so bad
RE: help with belt conveyor cooling system
A quick calculation gave me 20,833 lb/min of iron pellets and at 300 ft/min on a 150 ft long conveyor you've got about 10,500 lb of iron loaded on the belt at any instant. I know that you could get a metal belt that could handle that but it would mean changes.
Have you looked into replacing the existing belt with a silicone rubber belt? Silicone belting can handle temperatures around 500F. I imagine that there is somebody out there that makes a belt that can handle your product and not burn up or break. Possibly you could change the belt without making any other changes.
RE: help with belt conveyor cooling system
1) Keep the belt system and fit covers over the belt with an extractor fan system to pull off the steam/water vapour produced.
2) Fit a quench unit prior to the belt then convey cooled pellets, ensuring sufficient residence time in the quench unit to take out the heat from the pellets.
3) Submerge the belt ensuring there is sufficient water to prevent the water temperature getting so hot it produces water vapour.
4) Use a wire mesh belt running over a plenum supplied with air so that you air cool the pellets during conveying. (I've seen this on briquetting plants).