A process for controlling the feed of first and second fuel streams and first and second streams of free-oxygen containing gas to the reaction zone of a free-flow partial oxidation gas generator comprising the following steps:
- (1) sensing the flow rate of said first stream of free-oxygen containing gas stream and providing signal a to an O.sub.2 /first fuel ratio control means and to a first oxygen control means, sensing the flow-rate of said second free-oxygen containing gas stream and providing signal b to an O.sub.2 /second fuel ratio control means and to a second flow control means, wherein said first and second streams of free-oxygen containing gas are supplied with free-oxygen containing gas from a main oxygen feedline to the system, and are subsequently combined and introduced into a gasifier burner;
- sensing the flow-rate of said second stream of fuel nd providing signal c to said O.sub.2 /second fuel ratio control and to said second flow control means, sensing the flow rate of said first stream of fuel and providing signal d to said O.sub.2 /first fuel ratio control and to a third flow control means;
- sensing the flow-rate of a first stream of temperature moderator and providing signal m to a fifth flow control means, comparing signal m in said fifth flow control means with a preset signal representing the desired flow rate for said first stream of temperature moderator and providing an adjustment signal n to a flow control valve for said first stream of temperature moderator, sensing the flow-rate of a second stream of temperature moderator and providing signal o to a sixth flow control means, comparing signal o in said sixth flow control means with a preset signal representing the desired flow-rate for said second stream of temperature moderator in line 36 and providing an adjustment signal p to a flow control valve for said second stream of temperature moderator;
- (2) dividing said oxygen signal a by said first fuel signal d in said O.sub.2 /first fuel ratio control means to produce a signal corresponding to the actual O.sub.2 /first fuel wt. ratio and comparing said signal in said O.sub.2 /first fuel ratio control means with a preset signal representing the desired O.sub.2 /first fuel wt. ratio and providing an adjustment signal e to said first oxygen flow control means from which adjustment signal f is provided to an oxygen control valve which controls the rate of flow of said first stream of free-oxygen containing gas from (1);
- (3) dividing said oxygen signal b by said second fuel signal c in said O.sub.2 /second fuel ratio control means to produce signal t corresponding to the actual O.sub.2 /second fuel wt. ratio, comparing said signal t in said O.sub.2 /second fuel ratio control means with a preset signal representing the desired O.sub.2 /second fuel wt. ratio and providing an adjustment signal g to said second flow control means from which adjustment signal h is provided to a second oxygen control valve which controls the rate of flow of said second stream of free-oxygen containing gas from (1);
- (4) introducing said first and second streams of free-oxygen containing gas into the reaction zone of said gas generator;
- (5) comparing said second fuel flow-rate signal c in said second flow control means with preset signal v representing the desired flow rate of said second fuel, and producing an adjustment signal i for second fuel flow rate control valve means, and passing the stream of second fuel into the reaction zone of said gas generator;
- (6) comparing said first fuel flow-rate signal d in said third flow control means with preset signal j representing the desired flow rate of the first fuel, and producing an adjustment signal k for first fuel flow rate control means, and passing the stream of first fuel into the reaction zone of said gas generator;
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- (7) a mixing together the second stream of temperature moderator from step 1 with the first and second streams of free-oxygen containing gas from steps 2 and 3 and/or b mixing together the first stream of temperature moderator from step 1 with the stream of second fuel from step 5, and introducing mixture a and/or mixture b into the reaction zone of the partial oxidation gas generator.