Thanks your responses.
My wife and I have talked a lot, and we both agree that we should only change if the offer is really good.
Our plan is to live in the new town (not planning to drive every day), so first, one of us would move, and later the other one.
I am not actively looking, I only sent...
First of all, sorry for my bad English. I am not native spoken English.
My situation is as follows: I am mechanical engineer with 8 years of experience. I have been working for my actual company for 4 years. This is a small engineering company, subsidiary of other bigger one. We are around 20...
Density is controlled by controlling the speed of the screw conveyor feeder (vsd), and the water flow (by a control valve). Screw feed rate is only estimated, since we don’t have any kind of weight controller or similar.
I am not very sure also about the density measurement. It is done by...
Finally, we have received the viscosity test. Our datasheets for the hydrated lime indicated a viscosity of 10 cps. The viscosity seems to follow a Power law.
The parameters for the viscosity goes from k=2000 cps; n=0.13 at 1030 kg/m3 density, to K=4500 cps; n=0.25 at 1080, that is the density...
I have sent some samples of product to laboratory for viscosity test. I would inform you when I have them.
Also it seems that there is some relationship between the problem and fast variations of the speed of the screw conveyor that feeds the mixing tank. For the moment not sure that it could be...
No, we don’t control the temperature of the return.
But about that, the temperature of the process has been increased from 40 to 75 ºC. The problem hasn’t been affected for the temperature change; we have exactly the same problem now and before. I have checked also the relationship with the...
The temp of the lime is monitored and controlled by mixing hot condensate and water. It stays constant around 75ºC with variations around 2ºC. There is no evidence of relation of temperature on this problem.
The recycle rate is round 200% for this phase. In the future it would be around 100% (if...
http://es.pg.photos.yahoo.com/ph/dimtec1972/my_photos
This is a graph of the systems parameters.
Brown line: pump speed
Red line: Discharge pressure
Pink line: Returning flow
Yellow line: Density
There is a density drop (around 5 gpl), is when the hose is added at the suction, and the speed...
The pressure transmitter we have in the impulsion goes from 6.5 bars at 1300 rpm, to nearly 10 bars at 1500 rpm. This doesn’t indicate any blockage or air bubbles trapped on the suction side. The pressure at the suction could be around 0.6 bar, the pump is feed by a tank, liquid level around 5...
kavous, 40m3/h in a 3" line, the speed would be around 2.3 m/s, aprox 7 feet/s. We have checked some spools on the line after 2 months on operation, and there is no presence of scale, neither 3" and 4" lines, so I assumed is not a problem of low velocity on the line.
We have a pressure...
The suction pipe from the tank to the pump is 4", with an eccentric reduction at the entrance of the pump, flat at the bottom.
The pipe just changes from 4" to 3" after the last feeding point. We have a manometer just before the reduction from 4" to 3", and we can see that the pressure drop on...
We are having some problems with an installation we just put in operation a month ago.
We are having some flow restrictions and we don’t know the cause.
We are pumping lime slurry (density 1080 gpl, temp about 60ºC).
The installation consists on a feeding tank, a centrifugal pump, a pipe ring...
