Telescopic hood

Posted in: , on 25. Oct. 2006 - 21:35

Dears,

we ,as a bagfilter designer and manufacturer, need a telescopic hood for suction a volume about 400,000 m3/hr.

please inform me references for design it or manufacturers who have experience in this field.

best regards

Masoomeh ■

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Hood

Posted on 26. Oct. 2006 - 01:03

You will probably end up using a telescoping loading spout and creating a suction flow through it.

There are several telescoping loading spout manufacturerers that have advertising on the forum look up section.

lzaharis ■

Telescopic Hood

Posted on 26. Oct. 2006 - 06:01

Dear Sir,

Thanks for your attention, but we need only a telescopic hood not loading spout.

we have an electric-arc furnace wich we should design a dedusting system for it. as the crane travel from top of the furnace we can't install a permenant hood at the top of the furnace. So we need a telescopic hood with suction capacity of about 400,000 m3/hr and travelling distance about 10m. it's enough that it can stop only at the ends. ■

Re: Telescopic Hood

Posted on 27. Oct. 2006 - 01:31

Originally posted by Masoomeh

Dear Sir,

Thanks for your attention, but we need only a telescopic hood not loading spout.

we have an electric-arc furnace wich we should design a dedusting system for it. as the crane travel from top of the furnace we can't install a permanant hood at the top of the furnace. So we need a telescopic hood with suction capacity of about 400,000 m3/hr and travelling distance about 10m. it's enough that it can stop only at the ends.



Now that I know what you are doing I can help you.

First is the vacuum hood in the ceiling permanently mounted to the roof trusses above the furnace.

With all that heat a telescopic hydraulic cylinder operating the telescoping trunk will fail and burn up and that is an unfortunate fact. cables and pulleys will melt so thats out as an option.

You are better off installing permanent ducting above the crane path with a larger inlet and forced draft fan away from the heat in the ducting and with heat proof motors such as a hydraulicly driven fan or next to the furnace body so it air path is drawn across the top of the furnace into a right angle hood and increasing the suction above 400,000 M/3 hour otherwise you really do not have many options.

I have never seen a ventilation system as you wish to install above a heliarc furnace. I would ask NUCOR or KRUPP for advice if you really insist on a telescoping hood unfortunately I think they will give you the same answer. ■