초록

A process and system for continuously pyrolyzing organic feedstock produces a solid carbonaceous residue of controlled volatility, in a manner that is highly energy efficient. The value of the gaseous product and of the pyrolytic oil produced are also optimized.

대표청구항 ▼

A system for carrying out the continuous pyrolysis of a feed of organic material that self-decomposes at elevated temperatures to produce a solid carbonaceous residue having a predetermined volatile content, a pyrolytic oil, and a gaseous mixture of condensible and noncondensible fractions, comprisi

A system for carrying out the continuous pyrolysis of a feed of organic material that self-decomposes at elevated temperatures to produce a solid carbonaceous residue having a predetermined volatile content, a pyrolytic oil, and a gaseous mixture of condensible and noncondensible fractions, comprising in combination: (a) a vertical shaft reactor for continuously effecting the pyrolysis of such feed as a descending packed bed, said reactor having inlets at sequentially downwardly spaced locations for feed, drying/preheating gas, thermal treatment gas and thermal energy recovery gas, and having outlets adjacent the top and bottom thereof for offgases and solid residue product, respectively; (b) means for treating the offgases from said reactor to remove therefrom entrained solid particulates and condensible fractions, to provide a cleansed gas; (c) means for recycling the cleansed gas to each of said drying/preheating gas, treatment gas and recovery gas inlets of said reactor; (d) means, independently associated with each of said inlets for drying/preheating gas and for treatment gas, for heating the gas prior to introduction into said reactor therethrough, said heating means being capable of producing a temperature in the gas introduced through said treatment gas inlet that is substantially above the temperature of the gas introduced through said drying/preheating gas inlet; and (e) means for adjusting the mass flow rate of the gas introduced through said drying/preheating gas inlet so as to maintain a constant temperature in the offgas stream.