You are going to use a lot of energy to dry the coal prior to burning and adding to the power plants operating expense and thats the big issue-

If you are burning lignite thats an issue that will not go away.

There no point in drying coals with a high inherent combustability due to is ability to spontaneosly combust either.

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1. its an opportunity cost item and that it is the issue

a. you will use heat energy created by the coal load to burn it to make steam -so whats the point in your question when the 40 percent moisture is a permanent problem

b. coal is hygroscopic like halite

2. how much energy in megawatts will be required to

dry the coal to an acceptable level?

a. How much energy will be required to dry the coal

to what I think is an acceptable level of dryness>

b. what is everyone else doing or not doing?

c. can I reuse the heat energy, and direct the volatiles

to the boilers economically, or simply exhaust them

to the atmosphere and add to to the air pollution

load I am discharging and not worry about it.

Your issue is an issue which requires an engineerng study to see if its economically feasable or advisable to implement dry storage with your volume of

coal burned.

You need to examine your operating methods and have an engineering study

completed as burning coal is not the issue.

its fine ask questions on the forum but-

your issue is not going be answered with a simple response simply because there is none, and it needs to be examined for the reasons I stated above in a billable hours study, or flat prepaid fee for services rendered. ■

Dear Sir

We suggest you turn the moisture issue to your advantage. Our proven Process Design and Surplus Plant utilizes high moisture coal and converts it to equal amounts of Oil and High Value Coal. For instance, 1000tons converts to 500 Barrels of saleable Oil and 500 tons of High Value Coal. Process is scaleable.

Zero Hazardous left overs.

Please feel free to contact us for additional information.

Sincerely,

Al Goodmundson

Phone Canada (306)-664-7260

Email norsequip@sasktel.net ■

in replying to your message left on this forum, the answer is yes there is a system which can dry raw coal of +40% moisture content.

The system itself can transport coal up to 500m vertical and horizontally, as well as drying the material itself. The key is the size of the particle. The finer the particle the better performing our system is. Our system is superb at removing free surface moisture, and therefore the finer the particles the more free surface moisture is available to be removed.

We don't use any direct heat source, and we can handle up to 500 tonnes per hour.

http://www.lfpumping.com

Check out our website for more information. ■

Originally Posted by JohnSmith1

....... and then evaporating the water .....l.

I think the originator is trying to get rid of water: not add more to be further evaporated.

With 40% moisture some free water, at least 25% of total can probably be removed at a dewatering screen. Try General Kinematics. ■