Method and apparatus for the pyrolysis of waste products
AssigneeHelma Lampl
InventorsOskar Herbold, Dieter Dittloff
Life of this patent
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Abstract
Apparatus and method for the pyrolysis of waste material such as old tyres in which cuttings of the waste material are fed to a reactor vessel and heated under sub-atmospheric pressure by an outside heat source, the decomposition products being given off mainly in the form of gases. Some of the gas is burnt to provide the heat.
Claims20
A method for carrying out the pyrolysis of waste products containing hydrocarbons comprising the steps of:
- disintegrating the waste products into cuttings;
- drying the cuttings;
- driving the dried cuttings through a reactor vessel having an entrance end and a delivery end;
- heating the cuttings as they are being driven from the entrance end to the delivery end of the reactor vessel to the decomposition temperature of the cuttings, said reactor vessel being maintained at a sub-atmospheric pressure, said reactor vessel further being maintained airtight and substantially free of oxygen;
- damming the cuttings at the delvery end of the reactor vessel such that the entire reactor becomes filled with the cuttings, said uttings being kept compressed at a predetermined dynamic pressure;
- and
- passing the decomposition gases and residue of undecomposed cuttings into a delivery chamber where said gases and residue are separately removed, said delivery chamber being maintained at sub-atmospheric pressure and substantially oxygen free by the exclusion of air.
Apparatus for carrying out the pyrolysis of waste products containing hydrocarbons comprising a reactor vessel having an entrance end and delivery end, a driven feed device provided in the reactor vessel for driving waste products in the form of cuttings between the entrance and delivery end thereof, a heating device arranged coaxially around the reactor vessel for heating the waste material cuttings, a charging hopper, which is at least partially heated, being connected airtightly to the reactor vessel at its entrance end, airtight closures of the hopper being provided, a delivery chamber connecting with the reactor vessel at its delivery end for receiving the decomposed products of the waste products, means for keeping the delvery chamber airtightly closed, a delivery closure separating the delivery chamber from the reactor tube means for biassing the delivery closure to its closed position and a blower, the suction side of which is connected to the delivery chamber to remove the gaseous products and maintain both the delivery chamber and reactor vessel at sub-atmospheric pressure.
Dependencies are inferred from the claim text.