Method and System for Controlled Gasification

Abstract

Disclosed is a system and a method of controlled gasification. The method includes introducing a first fuel to a gasifier in a system, introducing a first fuel to a gasifier in a system, generating a product gas by partially oxidizing the first fuel with an oxidizer including oxygen, directing a first portion of the product gas to a process chamber, and selectively introducing a recycled portion of the product gas to the gasifier.

1 . A method of controlled gasification, the method comprising:
 introducing a first fuel to a gasifier in a system;   generating a product gas by partially oxidizing the first fuel with an oxidizer including oxygen;   directing a first portion of the product gas to a process chamber; and   selectively introducing a recycled portion of the product gas to the gasifier;   wherein a quality parameter of the product gas is analyzed;   wherein introduction of the oxidizer and the selective introduction of the recycled portion of the product gas is based upon the quality parameter of the product gas stream; and   wherein the first fuel includes a solid fuel.   
     
     
         2 . The method of  claim 1 , wherein the first portion of the product gas directed to the process chamber is directed based upon an energy value signal from the process chamber. 
     
     
         3 . The method of  claim 1 , further comprising selectively introducing a second fuel with the first fuel, the second fuel having a different phase and composition than the first fuel. 
     
     
         4 . The method of  claim 1 , wherein the process chamber is a furnace. 
     
     
         5 . The method of  claim 1 , wherein the process chamber is a gas turbine. 
     
     
         6 . The method of  claim 3 , wherein the energy value signal corresponds to an amount of output from a generator powered by the system. 
     
     
         7 . The method of  claim 3 , wherein the energy value signal corresponds to one or more of a temperature, a pressure, and a flow rate of a stream within the system, or the energy value signal corresponds to a representative temperature of a component within the system. 
     
     
         8 . The method of  claim 1 , further comprising selectively introducing one or more additives to the gasifier, the one or more additives being selected from the group consisting of fly ash, compounds containing calcium, compounds containing magnesium, compounds containing silicon, compounds containing aluminum, compounds containing iron, and any combination thereof. 
     
     
         9 . The method of  claim 1 , further comprising selectively introducing water or steam to the gasifier. 
     
     
         10 . The method of  claim 1 , further comprising selectively introducing oxygen to the gasifier proximal to the recycled portion of the product gas. 
     
     
         11 . The method of  claim 1 , further comprising selectively introducing oxygen to the process chamber. 
     
     
         12 . The method of  claim 1 , wherein the analysis of the product gas stream includes identifying a concentration of CO in the product gas stream. 
     
     
         13 . The method of  claim 1 , wherein the analysis of the product gas stream includes identifying a concentration of H2 in the product gas stream. 
     
     
         14 . A system for performing the process of  claim 1 . 
     
     
         15 . A system for controlled gasification, the system comprising:
 a gasifier configured to receive a first fuel and generate a product gas by partially oxidizing the first fuel with an oxidizer including oxygen;   an analyzer configured to analyze a quality parameter of the product gas; and   a controller configured to receive a product gas quality signal and to respond to the product gas quality signal by initiating selective adjustment of one or more of an oxygen flow rate being introduced to the gasifier, a recycled product gas flow rate being introduced to the gasifier, and a flow rate of the first fuel;   wherein the system is configured to recycle at least a portion of the product gas to the gasifier;   wherein the first fuel includes solid fuel.   
     
     
         16 . The system of  claim 15 , wherein the controller is further configured to receive an energy value signal and to initiate an adjustment in a flow rate of the product gas to a process chamber in response to the energy value signal. 
     
     
         17 . The system of  claim 15 , wherein the product gas quality signal includes a concentration of one or more of CO, H2, CH4, and CO2 in the product gas and a representative temperature of the gasifier. 
     
     
         18 . A system for controlled gasification, the system comprising:
 a gasifier configured to receive a first fuel and generate a product gas by partially oxidizing the first fuel with an oxidizer including oxygen; and   a controller configured to receive an energy value signal and to initiate an adjustment in a flow rate of the product gas to a process chamber in response to the energy value signal;   wherein the system is configured to recycle at least a portion of the product gas to the gasifier;   wherein the first fuel includes solid fuel.   
     
     
         19 . The system of  claim 18 , wherein the controller is further configured to receive a product gas quality signal and to respond to the product gas quality signal by initiating selective adjustment of one or more of an oxygen flow rate being introduced to the gasifier, a recycled product gas flow rate being introduced to the gasifier, and a flow rate of the first fuel. 
     
     
         20 . The system of  claim 19 , wherein the process chamber is configured to receive selectively introduced oxygen.