Spray Dryer Deposition Problem

by the looks of it absolutely nothing

http://www.google.co.uk/search?q=Executive+Utilities&sourceid=ie7&rls=com.microsoft:en-gb:IE-SearchBox&ie=&oe=&rlz=1I7GGLT_en&redir_esc=&ei=iC6WTO38Fc-TjAf8ieiYBQ

Well it's Horlicks which is supposed to help you sleep.

Most management I've come across seem to be asleep.

So, it's a lumpy executive sleeping aid.

Thanks. I haven't designed any spray dryers themselves, but am familiar with the requirements and have supplied a lot of dust collection equipment for them over the years.

Sealing,

My post was to the OP (original poster), not to JVRJ. I did not reply to JVRJ because he was not the person looking for an answer. Second, JVRJ's response shows that he does not truly understand the problem (as he states in his first line) and, hence, he cannot give a response that addresses the OP's original problem. Third, JVRJ's post indicates he does not understand the operation of a "spray dryer". There is no "wet cleaning" or "dry cleaning" involved in the operation of a "spray dryer". A spray dryer is a large tank with spray nozzles on the top and (usually) countercurrent warm air flow upward through the tank. The desired "powder" is in a slurry of (usually) water or other liquid, pumped through the spray nozzles at the top, and gravity dropped through the tank. The upward warm air evaporates the liquid from the "powder" and passes out the top of the tank to a dust collector, or other dust entrapment device, to extract any residual powder that may be carried in that warm air stream. The "dried" powder then drops into the bottom of the tank where it is removed. There should be no buildup of product on the walls, as OP indicated, and there is no "wet cleaning" or "dry cleaning" required, except in the case of a powder material that will degrade over time. Then, as OP stated, a CIP (clean-in-place) water spray is used to wash any residual material out of cracks, off the walls, etc. However, this material is considered scrap and disgarded. Hence, the desire is to have as little residual material in the tank as possible. OP has a system that is leaving a lot of residual material and is looking for some means of solution. His proposed cleaning methods (wet washing or "dry cleaning") should not be required if the system is properly designed for the product yield he desires. This was the point of my post.

I recognize JVRJ's contribution to the issue, as the same to everyone else's post, and assigning of GA's is based on any particular individuals take on the content of the post. I don't believe JVRJ directly provided a "Good" response to assist the OP. Someone else may differ with my opinion. In addition, my post was intended to assist the OP, not to collect GA's. It is my belief that he needs to review the overall design of the spray dryer rather than approach his problem with a "bandaid" fix. Don't take offense with this, or other posts, as I'm only trying to point out, or clarify to you, my take on this. As to the other contributors to this thread, I don't know them personally and only know of them through this forum. There may be some cliques on this forum between posters, but those, I believe, are generated by similar thinking, common interests, etc., and not to "gang up" on others. The prime interest of everyone here should be, and is, to help someone else that has a problem.

One final thought. I have clearly labelled this post as "Off Topic". Therefore, please no GA's from anyone.

I concur with you 100% and based on the record or number of GA's JVRJ has, I would expect him to be a brilliant fellow. However, on review of his GA's as listed under his profile (expecting to see a crackerjack) I find his GA's are by and large very nominal in contribution to the topic or knowledge thereof. Look at them for yourself. Oh well, I guess being an anonomous pseudo genius on the web really makes some people feel important. OHHH, did I say anonomous!!!!

Strangely I agree with what you say, and i only answer here because of your stating , by implication, that i write nonsense here. We'll get to that just now. As for driers, i have experience, including hands on, of a variety of driers and drier types, like fluidised bed, spray drier, manual and old fashioned,as per the OP, and automatic. The one I based my "non understanding" on was the Vometic, a world renowned brand, which you may know. My personal involvement spans drying of soups, instant soups, condiments ( brands kept off the forum) relished the worldover and lately yeast. A prototype for yeast was designed and built by myself 17 years ago. I understood the OP problem to be the fouling on the sides. My opening line asked for more info about the process, as different understandings of operationg procedures can lead to his problem. What you read into the understanding cant be laid at my door, nor can i be castigated for the observation of another poster. Idiots like a lot of these supercritical GUEST'S we find on this forum nowadays are becoming a problem here. The mods should not allow posts from these faceless guys, nor should they be allowed a vote. However, to the reason for the way i post, or what i post. Any poster that expects specialist solutions to his specific problems must be foolish. I believe this forum is to help people along specific guidelines, and not to lay out a physics handbook, or try to impress people with your knowledge. If the advice posted here seems to match your query, then come back and ask that specific posters for more info. THEN you may engage in more indepth advice. Most posters dont come back and report on their solutions any way. Thus this forum have become a "waffle" spot for wannabe engineers and idiotic guests. It seems i have some faceless/nameless followers who only peruse my profile and judge me. GA's, i agree with you are not important, and ive seen GA's being allocated to silly repomses, even to a posters adding info to his own post got GA's. These faceles guests then OT your reponse out of pure malice.

jvrj, et al,

My apologies if I did not correctly interpret your posting. Mea culpa. In rereading I do see your point of view and, based on your followup (to which I am replying) do note your dryer experience and the interests of the OP. Again, I apologize for any perceived slights. Let's hope OP reads these and follows a good path towards solving his system problems. And thanks for your contributions to this discussion. As for your profile, I have no interest in reviewing that, or anyone's, to assess their capabilities or experiences. We all do what we want to do and contributing, or not contributing, is a personal choice. Likewise, "granting" GA's to any particular poster is a personal choice of the grantor, based on their own perceptions and nothing more.

Thanks YESMAM, I appreciate your coming back here, which illustrates the type of poster you are and, believe me, there are some very petty posters here. Youre right, a lot of OP's just disappear with no feedback.

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