Comprehensive utilization system for waste heat steam of steel enterprise

Abstract

The invention discloses a comprehensive utilization system for the waste heat steam of a steel enterprise, which comprises a sintering smoke desulfurizing device, a sintering machine and a sintering waste heat boiler, wherein the sintering smoke desulfurizing device, the sintering machine and the sintering waste heat boiler are successively connected, and a dry-quenching waste heat boiler matched with a coke production device is connected with a steam turbine generator unit. The comprehensive utilization system has the key point that a high-parameter steam outlet of the sintering waste heat boiler is respectively connected with the coke production device and the steam turbine generator unit, and the low-parameter steam outlet of the sintering waste heat boiler is also connected with the coke production device. In the comprehensive utilization system, the arrangement relationship of two technical systems of coking and sintering in a steel factory area is fully considered, the waste heat utilization of two production technologies is organically combined, the purpose of utilizing energy according to quality, making temperature geared to the needs of the job and utilizing by steps is realized by the policy of energy matching utilization according to respective waste heat characteristics and the parameter characteristics of the waste heat steam of the two production technologies. The situations that the waste heat steam is largely diffused, high-parameter steam is used in the mode of thermoreduction and pressure reduction and the like can be avoided, and the waste heat steam use ratio is furthest improved.

Description

technical field [0001] The invention relates to a system for recovering and utilizing waste heat of flue gas in the production process of iron and steel enterprises. Background technique [0002] At present, the waste heat recovery rate of my country's iron and steel enterprises is generally not high, with an average of about 30%, and the advanced level has only reached about 40%, so the recovery potential is great. In terms of waste heat recovery and utilization methods, except for some used for process preheating, most of them use heat exchange to generate steam for power generation. However, due to reasons such as system design, process operation, and equipment stability, a large amount of waste heat steam has been released, and high-parameter steam has been used at reduced temperature and reduced pressure, resulting in a huge waste of energy. [0003] In order to improve the utilization level of waste heat steam in my country's iron and steel enterprises, improve the re...

AI Technical Summary

Problems solved by technology

Although this patent involves the comprehensive utilization system of waste heat in iron and steel enterprises, it only separates coking and sintering, and does not comprehensively consider the characteristics of the two production processes. To "use energy according to quality, match temperature, and use cascades"

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