Recent content by nbog

Don't you have process eng in your office? He should be able to give you all these answers.

Aditionally, Could you show me one of this "donwflow type of mixer"?. I didn't see one of this before, but I can supposue its basics functions. Try to find what type of mixer is used for thickener feed tanks. It is not a must, but could be considered. Another questions. When you mix NaMBS...

why not just do this: 1. fill the mixing tank with water 2. dump the bag in the tank and keep mixing until dissolved 3. transfer the solution to your storage tank Don't know the capex limits or life of mine, but still - most of the reagents (except sometimes lime slaking) are done in a batch...

40 psig is the backpressure in the cooling jacket.

Fzob, the "vessel" is made of a 6" pipe, jacket welded onto it.

6" pipe, 2 feet long, built as a pyrolysis chamber for R&D, welded cooling jacket. Gas side: T~ 600 C, P = 10-15 inWg vacuum, Jacket: water, 40 psig, 20C in, 35 C out R&D is over, we ran the system for a year, pyrolyzing salts and collecting the powders, all worked good... time to build a demo...

0707 (Luis) - I did exactly the way you described. It is unbelievable how much you can learn (being fresh from school) from operators. I would just add: Find 1 or 2 guys close to retirement, those are willing to transfer their knowledge, discuss the things and ideas with them - you might hear...

As MortenA said, there is no way you are going to have your liquid N2 "liquid" for so long. Your insulation is there just to minimize evaporation when the tank is not in use. We just order N2 when we have need to use it. Make sure the valve we call "pressure builder" is shut-off. It may be...

As unclesyd said, a rotary tumbler is one of the answers. I had it in a fertilizer (granular) plant. I added a lance with 2 spray nozzles and never had problems with it. You have to keep in mind that (depending on the properties of your granules) you might have to handle dust. We had...

Graphoil (with SS, sandwitch type) can work if the atmosphere is not oxidizing. http://www.usseal.com/grafoilspecs.htm

As cub3bead said, air-to-cloth ratio 3-5 should be OK for this case although, if you have a bin-vent type of baghouse (i.e. air flows upwards from the baghouse base, calculate min. settling velocity of your powder and make sure it is higher than the air velocity in the baghouse. Otherwise, you...

Thanks adamnat, I hope it will not affect the base material, it is 304 SS.

Hi all, one of the potential pump vendors (gear pump) wants to coat pump gears with DLC coating. Liquid I want to pump may contain up to 40% of nitric acid. Is the coating compatible with this application? I heard a case of WC coating failing after 100 hrs in a gear pump pumping nitric acid...So...

Gas velocity should be above "saltation velocity" but going to high will cause erosion (abrasion) in your pipeline (mostly bends). Try to find recommended velocities for your material, but be careful - recommended values are safe as long as your powder's morphology (particle shape) and size...

I am kind of confused about this: My title in the company I work for is "Process Engineer" although the company nor the job description requires professional designation i.e. P. Eng (Canada, BC). Is it against the law if I use "Process Engineer" title on my business card? I don't have P. Eng...