Chemical Forums

Specialty Chemistry Forums => Chemical Engineering Forum => Topic started by: Bashir2008 on August 27, 2008, 03:30:50 PM

Title: I need help with this question please
Post by: Bashir2008 on August 27, 2008, 03:30:50 PM
Hello everybody..

I have aquestion and hope to get help..please bear with me and try to finish reading my question..

Thank u very much for your time.

My question is

I have a pilot plant filter.. and i need to add some chemicals to the raw water before entering the filter..say for instance the water flow rate is around 20L/h

the concentration of the chmical solution is %10 (mass ratio).. and i need to add (dose) 5mg/L...which means 5mg of the chemials to 1L of water (flows in pipe before the filter )..
My question is how much (liter or milliters ) of the solution (chemicals) should i dose it to the water to give me the 5mg/l ?
I need to solve this problem in order to get the specification of the right dosing pump that i need to buy..
So please try to help me out with this.
Thank u very much
Title: Re: I need help with this question please
Post by: Borek on August 27, 2008, 03:40:23 PM
This is simple dilution question. 5 mg/L - how much per 20L? That'll give you mass of the reagent. Next step is to find out mass of the solution - you already know mass of 10%. Once you know solution mass, to convert to volume you will need solution density.
Title: Re: I need help with this question please
Post by: Gerard on August 28, 2008, 10:28:59 AM
Quote from: Bashir2008 on August 27, 2008, 03:30:50 PM
Hello everybody..

I have aquestion and hope to get help..please bear with me and try to finish reading my question..

Thank u very much for your time.

My question is

I have a pilot plant filter.. and i need to add some chemicals to the raw water before entering the filter..say for instance the water flow rate is around 20L/h

the concentration of the chmical solution is %10 (mass ratio).. and i need to add (dose) 5mg/L...which means 5mg of the chemials to 1L of water (flows in pipe before the filter )..
My question is how much (liter or milliters ) of the solution (chemicals) should i dose it to the water to give me the 5mg/l ?
I need to solve this problem in order to get the specification of the right dosing pump that i need to buy..
So please try to help me out with this.
Thank u very much
{(5 mg chemical/L sol'n) (volume of solution to be used in L) (10%) }/ (the density of the chemical at operating temperature) = the volume of the chemical needed at specified temperature
Title: I need help with this question please
Post by: Awasi on October 13, 2008, 02:34:33 PM
Hey all !!

Can somebody enrich me something about combustion engines, what are they used for and how they work ??
I have to make a search report on this topic ??