Re: Sewage sludge Processing

Dear Mr.Ovan,

Thanks for your valuable time.You got the crisp and iam in this process of study .If you could help me giving the process flow and suppliers of msw processing ,it will be of great help to me.

 Kindly help me out please if possible......

can you get some details from the plant you have visited?

Could  you please mention me the moisture content of your msw as received?

How much % of the rdf output you get with calorific value above 4000 Kcal?

How much is the power consumption of processing?

Feeding methodology of RDF into the kiln?

How much is the main fuel substitution you get from the rdf feeding ?

My questions are numerous and i think you can answer few.also please mention about urself,that iam interested to know.

I welcome all of you gentlemen to hlep me out if they have such experience  .

Again thanks a lot Ovan

Regards,

Kesavaraj

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Re: Sewage sludge Processing

Like I told you, I am not really in this kind of processing, but it is quite easy to find documents on the Internet. Here is an example of a complete RDF plant involving drying and pelletizing of the RDF: http://www.gec.jp/JSIM_DATA/WASTE/WASTE_2/html/Doc_394.html

The moisture and heat value will depend on the origin of the waste (industrial/municipal) and type of processing (drying, method of separation). What we get in Europe will vary between 2 and 30% moisture for a heat value usually between 5000 and 3000 kcal/kg. Usually, the product from one processing plant will be fairly constant over time.

For introduction to the kiln, we will usually use a bin equipped with a walking floor for storage, followed by a screening device (disc screen or rotary drum) and overband magnet. The transport system to the burner will generally be mechanical (closed belt conveyor), although some pelletized RDF can also be transported pneumatically. You also need a small bin and weightfeeder preferably close to the injection point.

Preferable injection point is in a modern, high retention time calciner. These can accept larger pieces of fuel, up to 5cms. Feeding to main burner would require additional shredding and screening below 1 cm.

A modern plant can achieve more than 60% substitution on RDF (RDF can be fed to more than 80% of the calciner fuel alone)

I think I cannot give you much more information.

Olivier Van Cantfort

Senior process engineer for the HeidelbergCement Group

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Re: Sewage sludge Processing

dear ovan ,

              Many thanks for your valuable reply andd a useful link you have given .

 Absolutely ur answers are crisp and tuned.

Again thank you very much and hope to be in touh with you ..

regards,

Kesavaraj

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