FIELD: heating.
SUBSTANCE: method includes multi-stage heating of coolant with oxidation gases, at the same time to each stage some coolant and some fuel are supplied, at the first stage oxidation gases are produced by catalytic oxidation of a gas-fuel mix, produced by mixing of heated air and the first part of fuel, and at each subsequent stage oxidation gases are produced by catalytic oxidation of the gas-fuel mix produced by mixing of oxidation gases of the previous stage and one of remaining parts of fuel. At the same time air is heated due to cooling of oxidation gases of the last stage, which are then released, and process medium is heated due to cooling of a mixture of heated coolant parts. Fuel and coolant supply to each stage is regulated depending on maximum and minimum temperature of catalyst.
EFFECT: invention increases efficiency ratio, reduces energy costs and metal intensity of equipment, and expands assortment of coolants and heated media.
3 cl, 1 dwg
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