Draft Etc.
Greetings gibbsy,
The eastern wilderness @ 1140 feet above mean sea level still has not dried out as of 13 july.
I almost lost a 30 ton lorry delivering fire wood
in the swamp. At the rate the weather is behaving I will not get all my fire wood before
thanksgiving.
I think you can solve your scale build up by increasing the propeller speed and thereby washing the walls of the tube much faster and reducing buildup of scale. Can you afford to have a faster liquor speed down stream? will you get adequate mixing if this is done?
Do you have the capability to increase prop speed via scr or vfd drive or the tried and true final drive gearbox change?
If I remember correctly Flight pumps has a test basin they use for everything/model any and all scenarios they are a better source of information I am sure.
Throw a few prawns on the barbie for me.
Hope all is well.
leon ■
Precip tank Draft tube innovation required
Gudday, Fellow Bulk handlers. I am chasing some insight into draft tube alternatives etc. My Industry has a number of these in service in our Precip tank liqour circuit. Some rough specs are as follows. Tank height is approx 30 metres. Tank Diameter Approx 14 metres. They have a central tube(draft) running from the top to the bottom with a clearance area at the bottom end. Draft tube is approx 5 metres in diameter with a central prop extending 2.6meters from the top of the tank. When running the prop drafts the liquor to the bottom of the tank via the tube.
The problems we experience are scaling and excessive growth off the internals and the externals of the tube. The tube is steel with no coatings or any other paints etc. the Liqour is Alumina / Caustic rich.
Any info is appreciated.
Gibbsy ■