FIELD: chemistry.
SUBSTANCE: invention relates to chemistry and energy. The method of using heat of synthesis gas to produce supercritical vapour in a low-energy apparatus for producing ammonia or methanol involves a step 1 for reforming or partial oxidation, at least one supercritical vapour generator 3 having a jacket side and a tubular side, at least one heater 14, at least one back-pressure turbine 17, at least one turbine 23 for extraction and condensation, and at least one pump 7 for feeding feed water into a boiler. Synthesis gas 2 is fed into the jacket side of the supercritical vapour generator 3. Feed water 4 is fed into the supercritical vapour generator 3 under pressure. The stream 13 of feed water is controlled to maintain constant temperature of vapour at the output of the supercritical vapour generator in the range of 375-500°C. Supercritical vapour is obtained in the generator 3 at pressure 225-450 bar. The supercritical vapour is then heated in the heater 14 to temperature 500-750°C and then fed into the back-pressure turbine 17.
EFFECT: invention enables to reduce power consumption of the apparatus.
20 cl, 4 dwg, 2 tbl, 2 ex
