NOVELTY - Integrated control system for the production of synthetic ammonia gas comprises multiple subsystems, where each subsystem comprises multiple gas producing furnaces (6), where the two ends of each gas making furnace are connected with a gas furnace upper part air flue (11) and a gas furnace lower part passage (12). An upper gas valve (13) and a lower gas valve (14) are connected with a coal gas header pipe. One end of the coal gas header pipe is connected with an emptying valve and a gas valve. One end of a gas washing tower semi-water gas pipe is connected with a scrubber tower.    USE - The device is useful for producing synthetic ammonia.    ADVANTAGE - The system: has comprehensive parameter measuring points; has improved operation of the optimized furnace by single controllability; has good coordination between the parts and hence has a stable operation for the gas production; and has low energy consumption.    DETAILED DESCRIPTION - Integrated control system for the production of synthetic ammonia gas comprises multiple subsystems, where each subsystem comprises multiple gas producing furnaces (6), where the two ends of each gas making furnace are connected with a gas furnace upper part air flue (11) and a gas furnace lower part passage (12). An upper gas valve (13) and a lower gas valve (14) are connected with a coal gas header pipe. One end of the coal gas header pipe is connected with an emptying valve, a gas valve and the other end is connected with a chimney. One end of a gas washing tower semi-water gas pipe is connected with a scrubber tower and the other end is connected with a single furnace gas washing tower outlet gas pipe. A gas cabinet is connected with an air main pipe via an air blowing valve. One end of the coal furnace lower part passage is connected with a steam main pipe via two steam valves and a down steam valve and the other end is connected with an upper nitrogen valve and a lower nitrogen valve. One end of a nitrogen master valve and a nitrogen pipe are connected. An uplink steam valve, an upper nitrogen valve of the gas furnace lower part passage, a down steam valve and a lower nitrogen valve of the gas furnace upper part air flue are connected. The integrative control system further comprises a workshop and a control station, where each sub-system further comprises a subsystem optimized control station connected with an input/output (I/O) station. The workshop and the control station are connected with a power scheduling station. The system optimizing control station is connected with one end of the I/O station, the other end of which is connected with an instrument group. The instrument group is set as follows: the gas furnaces along the same shoulder, which are uniformly distributed along the circumference, are provided with three infrared image collectors connected via an integrated photoelectric converter, a combustion furnace signal converter and the I/O station; the gas production furnace is provided with a furnace bottom thermocouple and connected with a motor, a furnace bottom thermocouple and the I/O station, which is set in the furnace bottom temperature transducer, motor and a fire grate transducer; the fire grate transducer end is connected with the I/O station, a grate speed transducer, whose other end is connected with I/O station and the upper part gas passage is provided with a thermoelectric couple and uplink pressure transducer; the gas furnace lower part passage is provided with a thermocouple and a down pressure transducer (PT102); the thermocouple and downlink I/O station are set in a lower temperature transducer, which connects with the I/O station; the gas pipe is provided with a steam utilization rate detector, which is connected with the I/O station; the single furnace gas washing tower semi-water gas outlet pipe is provided with a special analyzing sampling probe system, an outlet semi-water gas flow meter, an outlet pressure transducer and a tower thermal resistor; a special analyzing sampling probe system with a sampling preprocessing device is respectively connected with an H2 component analyzer, s multi-component gas analyzer for micro domain component, a carbon dioxide multi-component mixed component analyzer, an H2 analyzer and a carbon monoxide multi-component mixed component analyzer; the carbon dioxide multicomponent mixed component analyzer is connected with the I/O station; the outlet semi-water gas flow meter is connected to a differential pressure transmitter and the I/O station; the outlet pressure transducer connects with I/O station and a tower heat resistor; the I/O station, which is set in the tower temperature transducer and the air pipe, is provided with an air pressure transmitter connected with an air balancing flow meter and an air pressure transmitter and I/O station; an air balance flow meter is connected with the air differential pressure transmitter and I/O station; the nitrogen pipe is provided with a nitrogen balance flow meter, which is connected with a nitrogen differential pressure transmitter and the I/O station; a steam pipe is provided with a steam pressure transducer and a pore plate (FE102), where the steam pressure transducer is connected with the I/O station. An INDEPENDENT CLAIM is also included for the production of ammonia using the integrated system.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the device for producing synthetic ammonia.    Gas producing furnace (6)    Gas furnace upper part air flue (11)    Gas furnace lower part passage (12)    Upper gas valve (13)    Lower gas valve (14)