Hi I am planning to design a sludge pump.
Would just like to know that is there any limitation in the sludge operational hours?
Tried to look for more information on it but din't really came up with anything...
Should I use the operational hours as a basis of my calculation for my pump...
thanks bimr,
but i tried a different approach where I use excel to create a range of high with the formula of
E = H + V^2/2g
from there I used the Yc value from
Yc = ((Q/W)^2/g)^(1/3)
from this Yc I calculated the head loss through screen by using kirshmer equation (hope i dint spell wrong)
HL...
I came across with this formula in the website:
Ecr/Ycr = 3/2 (b/B)^(-2/3)
where
Ecr = critical energy
Ycr = critical depth
b = reduced diameter due to the obstacle
(B - Diameter of obstacle)
B = channel width
but I dont seem to be able to find it in any reference book.
This formula is...
I agree that you will need to take unit measurements into considerations. But what if I have a channel which has no slope (horizontal) ? I do have an incoming flow rate, Q of lets say 300m3/hr. We will still have a water depth and width right?
I've tested the way but my advisor says that it is not quite practical to put a weir or flume just to find or control the velocity. What he wants from me is to estimate what will be the water depth in the channel when a particular flow rate is run through it. The channel contains one screen...
Currently I'm designing an open flow channel to enable fix flow rates through the channel. Currently I have the width of the screen/channel, but the problem arise because I cant determine the water depth that the water need to pass through the screen. I've tried various ways to find them and the...
yes i do know the screen dimension except the height of the screen. But the design is intended to screen water with depth less than the height of the screen and therefore I don't have the height of the water which is my unknown. I tried the approach of giving it a variable H to calculate but I...
But i guess i wont say that he is reluctant to teach me because he don't know. Recently he is just too busy and he does want me to think more :)
I admit I wouldn't be thinking much if he just tell me the 3 things that I was suppose to do ^^.
Anyways thanks everyone for the help.
We do run real test but for my current design I'm not going do any design/test run just yet. I'm just doing the basic calculation. So he just say put this as an early base assumption. When we do the real testing then only do the adjustment.
I've discussed with my advisor today and actually what he wanted me to did was:
1st decide the amount of time before each purge of air (open of air valve).
2nd decide the volume accumulated before each purge of air.
3rd design the tank with 1 minute retention time.
He said I din't have to think...
haha.. actually he did guide me for the past month, but i guess he wanted me to move my brain more. :P
Currently my work is to design a range of separators which can be used for different kinds of flow rates and I guess the main problem I am facing now is the lack of any real life experience...
Actually I've just finish my diploma and currently working as a chemical engineer trainee. My advisor is quite busy and I guess he has no time to instruct me on this matter. Thanks for the help :)
Actually I'm currently designing a separator which is used to remove excess air from saturated water after passing through a saturation tank but I'm not too sure about the level controller design.
1)How do I know at which point should I open my valve to release my air and to release my water...
I'm currently designing a separator which is used to remove excess air from saturated water after passing through a saturation tank. From thread124-155681 i saw some information that is usefull for my design but I'm not too sure about the level controller design.
1)How do I know at which point...
Currently I am designing a open flow channel flowing through a screen which is installed at an angle of 70 degrees in the open channel. I have my discharge rate, and the width of the channel. Is there any possible ways that I can estimate the height/depth of the water without knowing the velocity?
I'm currently doing a design for a liquid gas separator. I would like to determine how to install my control valves, typically level controls. But I'm not too sure about the pressure drop when the valve is opened, therefore I do not know how to design my liquid depth and the maximum and minimum...
