Thermal treatment process for waste and/or residual materials
AssigneeWTU Warmetechnik und Umweltschutz GmbH
InventorsFranz Baltzer, Horst Juptner
Life of this patent
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Abstract
For thermally treating waste and/or residual materials, in particular fiber glass, glass silk, glass wool and glass mat coated with organic materials, a drum (1) with embedded elements is used to make the materials circulate. In this drum the materials are heated up to a temperature at least equal to the carbonization and/or evaporation temperature of the coatings but lower than the softening temperature of the materials. The waste or residual materials are preferably increasingly disaggregated in the drum and are heated by a stream of hot gas which flows in the drum from the discharge side (11) to the inlet side (4) and has its highest temperature at the discharge side.
Claims9
A method for thermal treatment of waste and residual material having coats of organic materials comprising:
- employing a drum having a rotation axis and having radially disposed projections being rotatable about the rotation axis with 5 to 30 rotations per minute;
- feeding the waste and residual material in said drum from a charging end portion;
- transporting said waste and residual material through the drum within at least 2.5 minutes;
- continuously and progressively disintegrating said waste and residual material during transporting said waste and residual material from the charging end portion to a discharging end portion;
- heating said waste and residual material by only a hot gas stream having a temperature of 200.degree. C. to 850.degree. C. in the drum and flowing from said discharging end portion to said charging end portion with a speed of about 0.2 m/sec, related to a mean free cross-section of said drum and 0.degree. C.;
- carbonizing and evaporating said coats of organic material in the drum;
- and
- completely combusting said organic material.
Dependencies are inferred from the claim text.