1. Field of The Invention
This invention relates to the production of fuel gas by the partial oxidation of sulfur and chlorine-containing liquid hydrocarbonaceous or solid carbonaceous fuels, purifying the fuel gas, and burning it in a combustion turbine for the production of power and environmentally-safe flue gas.
2. Description of Prior Art
In coassigned U.S. Pat. No. 3,868,817 fuel gas having a mole ratio (CO/H.sub.2) dry basis of at least 0.30 is produced by partial oxidation in the presence of a CO.sub.2 -rich temperature moderator. After further processing, the fuel gas is burned in a combustion turbine. Production of fuel gas by partial oxidation of a hydrocarbonaceous fuel using comparatively high steam to fuel weight ratios and no subsequent catalytic methanation step is described in coassigned U.S. Pat. No. 3,688,438. In coassigned U.S. Pat. No. 4,075,831 purified and humidified fuel gas is burned in a gas turbine to produce mechanical work and electrical energy. A mixture of air/steam is mixed with fuel and burned to drive a gas turbine in U.S Patent No. 4,537,023. However, the prior art does not teach or suggest the instant invention which provides the steps of cooling chlorine and sulfur-containing raw fuel gas in a radiant cooler and splitting said raw fuel gas into two streams A and B; further cooling said stream of raw fuel gas A by indirect heat exchange with a stream of nitrogen gas, further cooling said stream of raw fuel gas B by indirect heat exchange with a stream of clean chlorine and sulfur-free fuel gas, removing HCl and particulate matter from both streams of raw fuel gas and combining them together, and removing sulfur-containing gases from said combined streams to produce said stream of clean chlorine and sulfur-free fuel gas comprising H.sub.2 +CO. Nor does the prior art provide the steps of introducing humidified clean chlorine and sulfur-free fuel gas and a separate stream of supplemental dry nitrogen gas into the combustor of a gas turbine where combustion with air takes place and flue gas containing supplementary elemental nitrogen but no chlorine or sulfur-containing or NO.sub.x gases is produced. Increased power and efficiency are obtained without polluting the atmosphere.