Spreading Water Equally Inside a Cylindrical Tank

Spray nozzle companies can provide nozzles of all sorts of spray angles, patterns, and flow rates. You are right that a typical shower head would have too narrow an angle.

Try a fire sprinkler head, they have a wide array of dispersal areas and shapes and are readily available in many delivery rates.

Also look for spray balls used in the food industry for sanitizing of tanks and vessels.

Put your cylinder in a carousel, rotate it with enormous and spray.

I once had the same problem. I designed a rotating 90 degree head(gear motor) that would index down the depth (top to bottom) of the tank.

I agree with Tornado!

Call a nozzle manufacturing company and they will specify exactly what you need!

I have never worked with this company so do your due diligence.

http://www.spray.com/

A simple Google search turned up hundreds of companies that would love to sell you a product!

I think that you should apply a little common sense and a smidgen of knowledge and find a 360° spray head by searching for it, using a search engine.

You've more or less defined the problem, now go solve it.

You could perhaps try a hot water version of this apparatus:

Something a little similar to the rotating arm in a dishwasher may work for you.

I think one of these:

would be better. Just take the rear wheels off.

Assuming this is a right circular cylinder - is it horizontal or vertical?

It won't work on a left circular cylinder (that's a joke, son).

I don't get the part about the 300mm spec. Is that the distance from the top of the cylinder to the point where the spray originates?

No offense but but your stated desire makes no sense to me. Water will not adhere to the sides of this cylinder so why care about the spray pattern. If the water spray touches the cylinder wall surface some of the water will wet the surface and run down that surface depending on the orientation of gravity. Some of the water hitting this stream will cause a splash effect. Then there is the micro-drops known as mist that will be created that will follow any wind pattern created. As anyone who has glanced at chaos theory knows, water droplet size and distributions are a random process. Uniformity is the antithesis of random.

None the less, many companies make a variety of water nozzles to spread water over a wide variety of different geometric shapes and distribution patterns.

If you want this 1 meter diameter cylinder of unknown height to have a uniform amount of water, fill it with water. I can even suggest a simple formula for how much water it will take.

Spraying Systems, Company is a excellent and knowledgable supplier.

Is this for a wash?, Alfa-laval has good sanitary sprays.

Maybe some help here: 26 chemical tank cleaning vol. 1 & 2 . reference you tube / www . k a r c o . i n

I assume You want water to be sprayed on side walls of a cylindrical tank for some cleaning purpose/surface preparation.

High pressure pump is required which are available with spray nozzles. You may have to add a mechanism that runs at a particular speed around the wall in a spiral path, Having pitch of downward travel 2/3 rd of the spray area. If it is a continued requirement use plc controll. [These types of sprays with hot water at 70 deg C can remove a good quality paint from the walls. With a particular nozzle it can remove rusted wall of hull of ship]

If the water can only fall 300mm I assume that must be the height of the tank. At 1m diameter that gives a volume of approximately 250litres. To guanentee complete coverage with a spray ball it will need to rotate and move up and down. The mechanism to do this is expensive and often unreliable. A simpler solution is to place your wash water input in the center of the roof. Cover the inlet with a thin (2mm) metal disc twice the size if the inlet and set it so that there is a 360° slot between the roof of the tank and the disc. Fit the disc in a way that makes the width of the slot adjustable. When water is forced under pressure through the slot it will flow across the underside of the roof in a continuous stream giving 100% coverage. As it hits the side walls it will flow down again providing 100% coverage. If the base is angled towards the drain, make the drain slightly small so that a shallow layer of water forms to guarantee complete coverage of the base. Now the only part not washed is the underside of the disc. If you radius (about 1mm) the top and bottom edges of the circumference a small amount of water will flow round the radius and drip off the centre of the underside of the disc completing your 100% surface area. I have used this solution on several occasions and provided the slot is set correctly it has worked every time. Warning any intrusions for mixer blade shafts or thermal pockets will cause blind spots. If this creates a problem consult an expert who can only provide a complete solution after sudying the tank in detail.

There are various styles of sprinkler heads available in fire suppression systems. One of those may do the job for you.

There are plenty of sprayers that are actually designed for this type of work that one shouldn't have to improvise

What kind of work is that? A water sprayer to wash with hot water can be easily found in any discarded dish washer. This kind of a task is so basic and simple of a task that I doubt this is what the OP is looking for. [If it is our help will be insufficient for other reasons. ]

There has to be something else to this request but I do not know what it might be. Might the volume of water per cycle be limited. Could it be that the average droplet dimensions must be controlled to no larger or smaller than a certain size. Is the water pressure level limited to just gravity fed pressure levels or will a Pierce pumper truck use this compression heated water to suppress smoke and fire in an air plenum.

I could go on an on about other plausible scenarios meeting the criteria of this incomplete puzzle. The missing details will determine how to approach solving this problem. I suspect the OP will never return with added information. This could simply be the OP had a revelation once they saw their own words written down. It could also be that they found a solution from somebody else.

you right,... there are a lot of assumptions here. why not a fire hydrant. I think the guarantee coverage will be 99.99999999999999%

Interesting when one goes off on a tangent,..... so with that said, as I stated before, try Spraying Systems, Inc. They are the experts, and I had Satisfied experience with them.

My bad for incomplete communication. 1. The tank is not empty. It has about 200kg of grains. Hence m/sm to move in the bed of material is ruled out. 2. The height of hot water falling to be low to avoid temperature loss (and thus energy reduced) due to longer exposure to ambient conditions. 3. The flow rate of water required is 15 - 20 litres per minute.

I am sorry if I brought out sarcasm in peoples' comments.

"I am sorry if I brought out sarcasm in peoples' comments."

don't be sorry, most are just bad jokes, that's why we have days jobs.... thanks for the info, so........ eliminating some of the assumptions, is the sprays to rinse off the walls of the tanks?

The information you have should be addressed more so to the experts. It sounds that the spray(s) you need are not going to be that expensive.

Grains? Are we talking cereal grains? Grains of ground coffee? Nuclear fuel pellet grains? Exotic alloy grains? Ceramic powder grains? Reactant grains? Grains of sodium hydroxide (beads)? Something you want to dissolve grains? Something you are washing, rinsing, or just getting wet? Why are you concerned with energy loss, is this a once through system? Why is the flow rate specified at that level? Do these "grains" exist at different levels in the cylindrical tank or is it always the same? Why design the tank with this much overhead (freeboard) if you are worrying about the distance the water falls? Are these some type of ion exchange beads (grains)? What kind of work environment is this?

Food grains

Ok, now we have some information to work with but not really enough to say buy product XYZ.

The temperature of the water while spraying will always drop. It will drop less if the humidity level is 100% but it still will drop.

You have some food product (grain) that needs to be either washed or moisturized (for sprouting?) by this sprayer. If this grain is wheat then wheat has a nominal density of 790 kg/m^3. The nominal volume of wheat is then about 1/4 of a cubic meter or about 250 liters. Your 1 meter diameter (circular?) cylinder must then be greater than 322 mm long to contain just the wheat and not the sprayer head, your desired clearance, water volume delivered, etc. Then there's the questions of orientation, soak time, drainage rate.

Please, don't get me wrong. I bring up all of these extracted details and questions not to provoke sarcasm or any other form of verbal abuse. I bring them up because you need somebody familiar with your process and sprayer technology to work together. The easiest method is to contact a sales engineer of a sprayer company like the firm Phoenix911 identified and talk to them. You might have to send them a picture or two of your existing operations. There may even be a sales representative near you that can visit your location. Playing 100 questions on a public engineering forum will not satisfy your problem.

Take a look at the following link. http://www.vortec.com/c-17-spray-nozzles.aspx

The Vortec Sprayvector line is interesting. I have played with all three variations of these nozzles and they do a great job. From your description I think the #1707 might be exactly what you are looking for. Follow the link above for literature, videos and pricing.

Full Disclosure. We are a distributor for Vortec, and I can save you 10% off of the published price on the web site. Let me know if I can help. Good luck with your search.

Dear Mr. Srini16,

Provide an inclined row of pipe with nozzles at 60 Degree space i.e., hexagonally in addition to the circular ring pipe wit nozzles. This circular ring pipe should be 50% dia. of the vessel. If dia of the vessel is more, then you may have to use a little more pressure.

DHAYANANDHAN.S