Process for the production of highly calorific industrial cheap fuels with simultaneous disposal of industrial and/or municipal sewage sludges

摘要

A process is described for the production of highly calorific industrial cheap fuels, which can be burnt at normal combustion temperatures between 1,200 DEG C and 1,500 DEG C, in particular up to 1,400 DEG C, with simultaneous disposal of municipal and/or industrial sewage sludges. In this case, biological, predominantly municipal sewage sludge, taken off downstream of the digestion tower, and/or low-loaded, highly calorific industrial sludge, possibly mixed with organic carbon carriers, is mechanically dewatered to 20 to 40 % by weight of dry matter and is ground with bituminous and/or brown coal of a medium particle size in the range from 1 to 5 mm in a mill to give a coal slurry/water suspension, which can be handled like heating oil and can be burnt as such, containing 25 to 35 % by weight of water and the remainder being dry matter, with addition of carbon-origin stabilisers which are known for carbon/water suspensions.