Method and system for producing synthesis gas gasification reactor, and gasification system

Abstract

A method and system for producing synthesis gas comprising CO, CO 2 , and H 2 from a carbonaceous stream using an oxygen containing stream. A stream containing a carbonaceous material, and a stream containing oxygen are injected into a gasification reactor, where the carbonaceous stream is partially oxidised to obtain a raw synthesis gas. The raw synthesis gas is removed from the gasification reactor and directed into a quenching section wherein a liquid, preferably water, is injected in the form of a mist.

We claim: 
     
         1 . A gasification reactor comprising:
 a pressure shell for maintaining a pressure higher than atmospheric pressure;   a slag bath located in a lower part of the pressure shell;   a quench zone comprising a tubular formed part positioned within the pressure shell, open at its lower end and its upper end and having a smaller diameter than the pressure shell thereby defining an annular space around the tubular part; and   a gasifier wall arranged inside the pressure shell defining a gasification chamber wherein during operation a synthesis gas comprising CO, CO 2 , and H 2  from a carbonaceous stream can be formed using an oxygen containing stream, a lower open part of the gasifier wall being in fluid communication with the slag bath and an open upper end of the gasifier wall being in fluid communication with the quench zone;   
       wherein:
 the lower open end of the quench zone is fluidly connected to the upper end of the gasifier wall and the open upper end of the gasifier wall is in fluid communication with the annular space; 
 an injector is present at the lower end of the tubular part for injecting a fluid cooling medium; 
 an injector is present in the annular space to inject a liquid in the form of a mist; and 
 an outlet for the synthesis gas is present in the wall of the pressure shell fluidly connected to said annular space. 
 
     
     
         2 . A gasification system comprising a gasification reactor and a quench vessel wherein the gasification reactor comprises:
 a pressure shell for maintaining a pressure higher than atmospheric pressure;   a slag bath located in a lower part of the pressure shell;   a quench vessel;   a gasifier wall arranged inside the pressure shell defining a gasification chamber wherein during operation a synthesis gas comprising CO, CO 2 , and H 2  from a carbonaceous stream can be formed using an oxygen containing stream, a lower open part of the gasifier wall being in fluid communication with the slag bath and an open upper end of the gasifier wall being in fluid communication with a vertically extending tubular part, which tubular part is open at its lower end and its upper end, the upper end being in fluid communication with a synthesis gas inlet of the quench vessel and wherein the tubular part is provided with an injector to add a fluid cooling medium at its lower end;   
       wherein:
 the quench vessel is provided at its top end with a synthesis gas inlet, with an injector to inject a liquid in the form of a mist into the synthesis gas and with an outlet for the synthesis gas. 
 
     
     
         3 . A system for producing a synthesis gas comprising CO, CO 2 , and H 2 , the system comprising:
 a gasification reactor having an inlet for an oxygen containing stream, an inlet for a carbonaceous material containing stream, and, an outlet for raw synthesis gas produced in the gasification reactor;   a quenching section connected to the outlet of the gasification reactor for the raw synthesis gas;   wherein the quenching section comprises at least one first injector adapted for injecting a liquid in the quenching section in the form of a mist.   
     
     
         4 . The system of  claim 3 , wherein the liquid comprises water. 
     
     
         5 . The system of  claim 3 , wherein the first injector during operation injects the mist in a direction away from the gasification reactor. 
     
     
         6 . The system of  claim 3 , wherein the quenching section comprises a second injector adapted for injecting a shielding fluid at least partially surrounding the mist injected by the at least one first injector.