calcuim hydroxid
calcuim hydroxid
(OP)
how to use calcuim hydroxide to increase pH in drinking water?
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RE: calcuim hydroxid
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RE: calcuim hydroxid
do we have to mix the solid poweder with water and dose it ? what about the temperature?
how we can make sure it will not precepitate at the buttom?
Do we need filter?
Do you have digram which can make the idea easier?
RE: calcuim hydroxid
The type of feed systems varies with the size of the application which you have not stated. Hydrated lime is more commonly used because it is easier to handle than quicklime.
Here is a simplified description. On large systems, bulk hydrated lime is stored in a silo. The dry material is metered out into an agitated slurry tank to make a slurry of about 20% lime. This slurry tank is located directly below the silo.
This slurry is then diluted to approximaely 10-15% hydrated lime solution in an agitated application tank. The slurry is pumped from the application tank to the application point where it is mixed into the water flow.
The temperature of the water is only important in the need for freeze protection.
http://www.chemcosystems.net/hydrated_lime_system....
http://www.indachem.com/Documents/Stanco-removed/L...
RE: calcuim hydroxid
Very important information
RE: calcuim hydroxid
A typical arrangement is to meter the lime into a mixing tank and dilute it with a constant volume of water. One then pumps it out of the mixing tank to the application point. This is much simpler. If you can, arrange it so that instead of using a pump have the slurry overflow the mixing tank and flow by gravity to the application point. Nothing is simpler than gravity. Anybody that has worked with lime will know that there is constant maintenace required on the pump and the piping. You will get calcium carbonate depostion on the interanl walls. Eventually you have to break it off or the pipe will plug solid. Therefore use rubber hose as opposed to solid pipe. With rubber hose you can "massage" the pipe and the calcium carbonate build up on the inner walls will crack off.
RE: calcuim hydroxid
RE: calcuim hydroxid
Thank you very much
I will try it
RE: calcuim hydroxid
1. Pnuematically convey the hydrated lime from the main storage tank to the augering hopper/auger/mixing tank
2. Locate the augering hopper/auger/mixing tank over the process application point
3. The auger then flow paces and meters the lime into the mixing tank. The mixing tank is fed a constant flow of mixing water. Therefore the pH of the slurry will change if there is a change in process flow. The mixed slurry overflows into the process by gravity. Nothing simpler than that. Almost zero maintenance