Sintered power generation by waste heat system with by-product gas afterburning

Abstract

The invention relates to a residual heat power generation system which is a power generation system with by-product gas supplemental combustion by sintering residual heat. The power generation system comprises a cooling machine, a waste heat boiler, a steam drum, a steam turbine, a boiler feed pump, an induced draft fan, an air blower and a chimney. A combustion hearth, a high-temperature superheater, a low-temperature superheater, an evaporator and an economizer are sequentially arranged on the waste heat boiler from top to bottom; the outlet of the high-temperature superheater and the steam inlet of the steam turbine are connected with each other by a pipeline; the waste heat boiler is provided with a sintering waste gas inlet and a by-product gas inlet; and the upper part of the cooling machine is provided with a high-temperature waste gas outlet, a middle-temperature waste gas outlet and a low-temperature waste gas outlet. The residual heat power generation system can greatly increase the temperature of the smoke and the temperature and the pressure of the overheated steam at the inlet of the steam turbine, and can improve the power generation capability.

Description

technical field [0001] The invention relates to a waste heat power generation system, in particular to a sintering waste heat power generation system with supplemental combustion of by-product gas. Background technique [0002] Existing sinter waste heat power generation systems such as figure 1 As shown, it includes a cooling machine 1, a waste heat boiler 16, a boiler feed water pump 15, a deaerator 14, a steam turbine 9, a generator 10, a condenser 11, a cooling tower 12 and a steam drum 8. There are ores 2 in the cooling machine 1, The cooler 1 is provided with a high-temperature air outlet 17 and a low-temperature air outlet 18 , and the waste heat boiler 16 is provided with a superheater 3 , an evaporator 4 and an economizer 5 sequentially from top to bottom. Waste heat boiler 16 imports waste gas from two air outlets 17 and 18 in cooler 1, and the inlet temperature is about 350-400°C. The waste gas enters waste heat boiler 16 after passing through dust collector 19, ...

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Problems solved by technology

[0003] The existing sintering waste heat power generation system has the following problems: ① The residual air from the high-temperature exhaust gas outlet 17 and the low-temperature exhaust gas outlet 18 of the cooler 1 is mixed and then enters the superheater 3, so that the temperature of the exhaust gas cannot be raised as much as possible.

②The exhaust gas temperature of cooler 1 is low, so the superheated steam parameters are low, the thermal efficiency of the system is low, and the power generation is small

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