Waste heat power generation system

Abstract

The invention provides a waste heat power generation system. According to the waste heat power generation system, steam generated by a steam generating machine is conveyed to a first-stage turbine and a second-stage turbine via a steam passage and is transformed into mechanical kinetic energy; a generator is then used for transforming the mechanical energy into electric energy, and a Venturi ejector is matched with a condensed steam furnace to replenish steam for the second-stage turbine so that the steam pressure and flow rate of the second-stage turbine are maintained within an effective working range; meanwhile, the steam temperature is reduced to prevent damages, caused by high temperature, of the steam passage, the turbines and power generation equipment; and the waste heat power generation system is high and stable in power generation efficiency, high in steam utilization rate and capable of saving resources.

Description

technical field [0001] The invention relates to a waste heat power generation system, which is specifically applied to the utilization of waste heat of an incinerator. Background technique [0002] Incinerator incineration heat supply is unstable, especially hazardous waste incineration has a large amount of smoke and dust, which is easy to adhere to the boiler wall. During the ash cleaning process, the boiler outlet temperature changes greatly, resulting in unstable steam pressure and flow rate; and in order to prevent the generation of dioxin, The inlet temperature of the waste heat boiler is required to be >1100°C, the outlet temperature of the waste heat boiler is required to be >550°C, and the adjustment range of the boiler is small; in the existing technology, the three boilers produce steam of 1Mpa and 15T / H, and only 9T of steam can be effectively used, and the remaining 6T is vented . The steam fluctuation range is 4.5 T / H~7.5 T / H, the steam fluctuation range...

AI Technical Summary

Problems solved by technology

[0002] Incinerator incineration heat supply is unstable, especially hazardous waste incineration has a large amount of smoke and dust, which is easy to adhere to the boiler wall. During the ash cleaning process, the boiler outlet temperature changes greatly, resulting in unstable steam pressure and flow rate; and in order to prevent the generation of dioxin, The inlet temperature of the waste heat boiler is required to be >1100°C, the outlet temperature of the waste heat boiler is required to be >550°C, and the adjustment range of the boiler is small; in the existing technology, the three boilers produce steam of 1Mpa and 15T / H, and only 9T of steam can be effectively used, and the remaining 6T is vented

The steam fluctuation range is 4.5 T / H~7.5 T / H, the steam fluctuation range is large, and the steam needs to be stabilized; while the turboexpansion generator has nonlinear power generation efficiency, and the power generation efficiency decays seriously when the steam flow and pressure are not within the working range

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