Waste heat recovery device for sintering machine and circulating cooling machine

Abstract

The invention relates to a waste heat recovery device for a sintering machine and a circulating cooling machine. The waste heat recovery device comprises a waste heat boiler of the sintering machine and a waste heat boiler of the circulating cooling machine. The waste heat boiler of the sintering machine comprises a waste heat boiler drum of the sintering machine, wherein the waste heat boiler drum of the sintering machine is provided with a steam outlet of the waste heat boiler of the sintering machine. The waste heat boiler of the circulating cooling machine comprises a waste heat boiler drum of the circulating cooling machine and a medium-pressure superheater. The waste heat boiler drum of the circulating cooling machine comprises a steam outlet of the waste heat boiler of the circulating cooling machine, wherein the steam outlet of the waste heat boiler of the sintering machine is connected with the steam outlet of the waste heat boiler of the circulating cooling machine, and the steam outlet of the waste heat boiler of the circulating cooling machine is connected with the medium-pressure superheater. According to the waste heat recovery device for the sintering machine and the circulating cooling machine in the structure provided by the invention, the quality of steam is effectively improved and the power capacity of a steam turbine is improved, so that the waste heat recovery rate is improved.

Description

technical field [0001] The invention relates to a waste heat recovery device, in particular to a waste heat recovery device of a sintering machine and an annular cooler in steel production. Background technique [0002] In the process of iron and steel production, the energy consumption of the sintering process accounts for about 10% of the total energy consumption, second only to the iron-making process, ranking first in the ring cooler. In the total energy consumption of the sintering process, nearly 50% of the heat energy is discharged into the atmosphere in the form of sensible heat of the exhaust gas of the sintering machine and the ring cooler. [0003] The waste heat recovery device of sintering machine and annular cooler is the key equipment for waste heat recovery. Its performance directly affects the effect of recycling the waste heat of exhaust gas of sintering machine and annular cooler, and occupies a very important position in the whole waste heat recovery tech...

AI Technical Summary

Problems solved by technology

Since the exhaust gas temperature at the inlet of the waste heat boiler of the sintering machine is relatively low, generally around 340°C, the parameter of the superheated steam produced by the waste heat boiler of the sintering machine is lower than that of the steam produced by the waste heat boiler of the ring cooler. The quality of the steam reduces the working capacity of the steam turbine, which reduces the efficiency of waste heat recovery and wastes energy

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