Method for the pyrolysis of a pyrolysable mass

Abstract

A method of pyrolysis wherein pyrolysable particles mixed with heated carrier particles are treated at an elevated temperature yielding a flammable product. According to the invention, use is made for mixing a rotating, vibrating or shaking element or by mixing at a volume density of less than 40%, and mixing occurs to a specified minimum degree after the mixture is deposited and is pyrolysed in the reactor after depositing.

1 . A method for the pyrolysis of pyrolysable mass in the form of particles, wherein the pyrolysable particles are treated in the presence of carrier particles at elevated temperature, yielding at least one combustible product, wherein: 
 the carrier particles are heated;    the heated carrier particles are contacted with the pyrolysable particles and are mixed therewith;    the mixture of pyrolysable particles and heated carrier particles pyrolyses in a reactor yielding a hot, gaseous, combustible product and a pyrolysable mass-depleted mixture; and    the pyrolysable mass-depleted mixture is removed for heating the carrier particles; and    wherein the carrier particles are supplied at a rate of A and the pyrolysable particles at a rate B, and mixing is carried out such that by using a method of mixing chosen from i) mixing by means of a rotating element, wherein the pyrolysable particles and the carrier particles at the centre of the rotating element come into contact with the rotating element and the rotating element rotates at a speed such that the pyrolysable particles and the carrier particles move over the surface of the rotating element to be hurled away; ii) mixing by means of a vibrating or shaking element, and the pyrolysable particles and the carrier particles leave the vibrating or shaking element over an edge thereof or hole therein, and iii) mixing at a volume density of less than 40%; and wherein before the mixture is deposited it is mixed at least well enough that in a sample of one cubic decimeter of the thus obtained mixture the A/B ratio deviates less than approximately 20% from the ratio at which A and B are added, and wherein the mixture obtained is deposited, and in a condition after pouring undergoes pyrolysis in the reactor, and the carrier particles are heated by passing an oxygen-comprising gas through the pyrolysable mass-depleted mixture discharged from the reactor.    
     
     
         2 . A method according to  claim 1 , wherein the deviation is less than approximately 10%.  
     
     
         3 . A method according to  claim 1  wherein contacting and mixing is realized by means of a rotating cone.  
     
     
         4 . A method according to  claim 1  wherein mixing and pyrolysis occurs in two separate chambers.  
     
     
         5 . A method according to  claim 1 , wherein the combustible product is cooled and separated into a liquidized oil component and a gaseous component.  
     
     
         6 . A method according to  claim 5 , wherein the gaseous component is to be combusted and used for drying the pyrolysable mass.  
     
     
         7 . A method according to  claim 1 , wherein the pyrolysable mass-depleted mixture is discharged from the bottom of the cast mixture.  
     
     
         8 . A method according to  claim 1 , wherein during pouring of the mixture in the reactor carrier particles are poured against the inner wall of the reactor.  
     
     
         9 . A method according to  claim 1 , wherein the pyrolysable mass comprising a carbohydrate comprises biomass.