CandiceTootell
Industrial
- Feb 7, 2024
- 3
Hi! I am NOT an engineer but I supply side channel blowers and vacuum pumps - normally to companies that have their own engineers and just tell me what they want. But in this case, I have a client that wants us to help him figure out which size unit to take.
This is a waste water system at altitude +/- 1600m.
There is a tank with dimensions: 8.4m(L) x 2.4m(W) x 3.0(H)
The depth of the solution is at 2.5m.
Solution specific gravity we normally use in this type of plant would be around 1.2
Blower installation is situated above the tank
So up to this point I can answer the question for the client. But then! He has a 52m length of pipe coiling in the tank which has 2mm diameter holes - 60 holes per meter. The pipe is 75mm (UPVC class 12). I am assuming it's blocked at the end. Normally the client would have airstones or diffusers which the manufacturer would dictate what airflow / pressure is required to open the solenoids / get the air at best flow.
The client has stated that he needs 1m3/min air flow in order to achieve the aeration he wants in the system.
My question is could someone please help me to have a formula that I can use in this situation where I could calculate the airflow and pressure of the system? I dont understand about pressure loss but I'm sure over that distance of pipe work it would exist? Do I just use the 1m3/min plus about 320mbar of pressure to size the unit? Am I over thinking this?
What other variables would be needed to create this formula? We often get asked about this so I would like to have something to send to clients to figure it out with them.
Thanks so much for your help. P.s. Please use as simple language as possible as I'm really not technical and really want to understand this!
Edited to add:
Client has just told me that he didn't explain clearly. What he has is a 75mm header pipe coming off the blower, then it goes into the chamber with 8 x 8.4m parallel 50mm pipes comes out of the 75mm pipe with T-Pieces and at the end of each pipe they are again connected to form a ring.
This is a waste water system at altitude +/- 1600m.
There is a tank with dimensions: 8.4m(L) x 2.4m(W) x 3.0(H)
The depth of the solution is at 2.5m.
Solution specific gravity we normally use in this type of plant would be around 1.2
Blower installation is situated above the tank
So up to this point I can answer the question for the client. But then! He has a 52m length of pipe coiling in the tank which has 2mm diameter holes - 60 holes per meter. The pipe is 75mm (UPVC class 12). I am assuming it's blocked at the end. Normally the client would have airstones or diffusers which the manufacturer would dictate what airflow / pressure is required to open the solenoids / get the air at best flow.
The client has stated that he needs 1m3/min air flow in order to achieve the aeration he wants in the system.
My question is could someone please help me to have a formula that I can use in this situation where I could calculate the airflow and pressure of the system? I dont understand about pressure loss but I'm sure over that distance of pipe work it would exist? Do I just use the 1m3/min plus about 320mbar of pressure to size the unit? Am I over thinking this?
What other variables would be needed to create this formula? We often get asked about this so I would like to have something to send to clients to figure it out with them.
Thanks so much for your help. P.s. Please use as simple language as possible as I'm really not technical and really want to understand this!
Edited to add:
Client has just told me that he didn't explain clearly. What he has is a 75mm header pipe coming off the blower, then it goes into the chamber with 8 x 8.4m parallel 50mm pipes comes out of the 75mm pipe with T-Pieces and at the end of each pipe they are again connected to form a ring.