Bimr,
Thanks for the response
This source, although not definative, shows signs of a marked difference in microbiological removal outside of the normal solids loading removal...
Can someone please advise comparison of efficiencies for removal of coliform and e-coli by ferric chloride and poly aluminium chloride for coagulation, flocculation, DAF and onto RGFs (and ph dependancies). We have a pre-treatment plant DAF plant with something like 75-80% turbidity removal at...
Filip,
Not sure exactly what you are asking here ?
We have been a fan of using PLC controllers (AB mainly) where we utilise a number of dosing modes.
For SBS, we would tend to have a feed forward sample providing a chlorine residual signal and feedback sample providing also providing a...
A practical limit does exist:
It is important not to exceed the designed backwash flow rate during a combined was-air scour stage due to collapse-pulsation leading to RGF media being carried over the launders. Depending on the wash sequence that you are employing, there are a number of factors...
Can someone please highlight for me what the main benefits are of inventor over the Autocad software. Is it a bit more like Pro-Eng?
I have never used it before but it is coming up in more and more of my dealings and I am just trying to find out if it is something I need to put time to.
Cheers
Or..instead of reading too many self-help books, use the money to enrol on a study course on a topic you have never done. The fresh challenge will pick you up, might open a new avenue or at least give you a break.
I used to know a doctor who instead of holidays, he often took a locam for a few...
Projects often have natural leaders that are right for the role. They often lead whatever. Some lead just by pure enthusiasm, determination and because they have what is missing in the rest of the team. Usually, they are good engineers and people you will follow.
Some good leaders just lead...
ccc123,
I have come across some disastrous jobs where estimations have been made from insufficient well draw down tests, both in terms of abstraction rates and the time of tests. A number of these have lead to lowering of pumps at a later date, which is costly and usually an operational...
Engineers are often merely pawns in this big bad world!!!! It is by engineers hands and brains, technological discoveries and applications, that "develpoment" occurs. However, it is not engineers who always decide how and when it will be used, that is left to the financials and the...
Hi,
By now you have probably found manufacturers. Otherwise, I may be able to help you as I have a large number of contacts with international manufacturers of such equipment as well as contacts at their offices/agents in China and the greater asia region.
Hi, I am interested in finding out if anyone has any experience with Asian manufactured pumps (and their associated motors) such as those manufactured in China.
I am looking to see if anyone has used any pumps manufactured in these regions, and if they have any advice on whether they are worth...
Hi johnhp
Yes that is correct. In the operation of boilers and steam turbines at high steam pressures one needs to remove air trapped in the steam/condensate by boiling and venting it. This is usually done as part of the boiler feed water heating,where the deaerator can be seen to both remove...
Apologies
noted that i left out the loss accross the heat recovery system and pollution device, it being the difference between the two fans, i.e: 350 mmH2O (i guess therefore a 'balanced draught').
Hi,
Not so sure about the concept of balanced draught for forced draught in boiler systems.
I have been given an estimate by a furnace manufacturer of:
Draught (pressure) accross the grate/bed of the incinerator of 150 mmH2O supplied by primary air forced draught fan, air temperaure of 200 C...
Hi, i am designing a small scale incinerator plant for waste to energy.
Concern is over the need to preheat combustion air prior to it entering the air heat exchanges utilising exhaust flue gas. Due to the corrosive nature of the flue gas and its relatively high acidic dew points i am concerned...
Yes, agree with Elvey's comments. The 'Stirling Machine' cycle as an external combustion engine has been around for a long time and many attempts have been made at utilising it. The theory is well worth the read, and if you do a search on any of the main search engines you will find that many...
Hi, i am new to the world of boilers and steam system design and would like to know if one still requires to place a deaerator for condensate after being used for process heat, and that has come from a back pressure (no-condensing) turbine at say 4 bar, where the steam/water remains at...
Hi,
I am unsure if i am posting this in the correct place, aplogies if not. On the subject of deaerators. My knowledge of their operation is limited , but i have a small capacity system to which i am unsure how to apply, or whether i need to apply, a deaerator.
Required boiler feed water...
