delivery system...

[Hydro-Cell]

hopefully someone can help on this.

i am trying to design a delivery system that will allow me to control the amount of powder entering a pressurised container.


the pressurised container is half filled with water. there is a hopper on top of it containing powderer aluminium/gallium.

what i am trying to figure out is how to put the powder in the water a bit at a time but so as not to loose the pressure in the container.
the container is pressurised due to the reaction taking place inside, i want to be able to control the powder as this will them become an on demand system rather than dumping in loads of powder and having too much gas produced when not needed.

so far ideas i have are a sort of corkscrew that rotates to feed the powder into the container.
a chamber that can hold a small amount of powder sort of like an air lock
and a disk that can hold say 6 small amounts of powder that turns and each time allows the powder to fall into the container.

all of these are just ideas. i like the idea of an airlock best as this willhold the pressure but i have no idea how to do it as i fear the powder will block the valves when they try to close. Any help would be great

cheers

[madddann]

Put the powder inside the pressurized cointainer and make a mechanism to dump it into the water (vibrator). Or maybe connect another container (for the powder) that would be under the same pressure and fill the powder into the one with water through a tube.

Dann

[Creativity]

cork screw is a good idea,just like in the nowadays heating system using wood chips.Look around.

I propose somehow new insight->if for the resction u need both water and powder,reaction won't proceed without one of them...this leads to a choice of what u want to dose in what,if u catch my drift 

Just make ur reactor as a sealed container with aluminium powder in it and drip desired amount of water to it, much easier IHMO
success.

[Hydro-Cell]

i see where your coming from but another major issue then is that i cannot simply add more powder when required. the plan is to have a replaceable cartridge that can be removed and replaced while the system is active.

iv got a long way to go but im sure i will get there

[madddann]

Guess you need some sort of powder or/and water injector with an "anti feedback" valve. There should be also an pressure adjustment valve and a safety valve on the container. Hope it helps.

Dann