Comprehensive utilizing system for firing waste heat and saturated vapor

Abstract

The invention discloses a comprehensive utilizing system for firing waste heat and saturated vapor, which comprises a firing waste heat recovering device, a main vapor mixing device, a turbine and a generator, wherein the firing waste heat recovering device comprises a circular cooling machine and a waste heat boiler; an air inlet is arranged on a front section of the circular cooling machine; the waste heat boiler is connected with the air inlet so as to obtain flue gas from the air inlet; the flue gas and a working medium are subjected to heat exchange in the waste heat boiler; a main vapor is outputted from a main vapor outlet of the waste heat boiler; the main vapor mixing device is respectively connected with the main vapor outlet of the waste heat boiler and an outlet of a vapor super-heater; the main vapor mixing device is used for respectively receiving and mixing the main vapor of the waste heat boiler and the external vapor; the pressure of the main vapor of the waste heat boiler is matched with the pressure of the external saturated vapor; a vapor inlet of the turbine is connected with the main vapor mixing device and is used for receiving the mixed vapor; and the generator is connected with the turbine and is driven to output electric energy by the turbine. The comprehensive utilizing system for firing waste heat and saturated vapor has the advantages that the stability of a generating system is increased by the mutual supporting of the vapors at two positions and the repeated construction is reduced by adopting centralized utilization.

Description

technical field [0001] The invention relates to the field of heat source utilization, in particular to a comprehensive utilization system of sintering waste heat and saturated steam. Background technique [0002] Sintering waste heat and surplus saturated steam are common waste heat resources in iron and steel enterprises. At present, domestic enterprises generally recycle these two waste heat resources separately, and build sintering waste heat power generation projects and saturated steam power generation projects respectively. [0003] Sintering waste heat power generation mainly takes the high-temperature waste gas discharged from the ring cooler in the sintering section as the recycling object, and uses the waste heat of the waste gas to generate power. figure 1 A schematic diagram of an existing sintering waste heat power generation system, such as figure 1 As shown, the sintering waste heat power generation system 100 includes an annular cooler 101, a waste heat boil...

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Problems solved by technology

When the number of converters is large, the overall steam production is relatively continuous, and the parameter fluctuation is small after the steady flow through the heat accumulator; when the number of converters is small, the problem of steam fluctuation is more prominent, which makes recycling difficult

[0007] In addition, both the sintering waste heat power generation project and the saturated steam power generation project are small-scale power generation projects. Most of the project construction scope, main equipment and operation and maintenance methods overlap, and the projects are constructed independently, resulting in a waste of resources to some extent

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