Thermal coupling power generation system of garbage incinerator medium pressure steam and coal-fired unit

Abstract

The invention discloses a thermal coupling power generation system of a garbage incinerator medium pressure steam and coal-fired unit. The thermal coupling power generation system is technically characterized in that a garbage incinerator body and a coal-fired unit are included; a high-pressure heater comprises a first-stage high-pressure heater body and a second-stage high-pressure heater body which communicate with each other; an ultrahigh-pressure cylinder is connected with a high-pressure cylinder; a water feed pump is connected with a low-pressure heater through a pipeline and is connected with a deaerator through a pipeline; the deaerator is connected with the high-pressure heater through a pipeline; the high-pressure heater is connected with the coal-fired unit through a water feedpipeline; the coal-fired unit is connected with a main steam pipeline; the main steam pipeline is connected with the ultrahigh-pressure cylinder; the ultrahigh-pressure cylinder is connected with a third-stage high-pressure heater body through a first-stage steam extraction pipeline; the ultrahigh-pressure cylinder is connected with the second-stage high-pressure heater body through a second-stagesteam extraction pipeline; the coal-fired unit is connected with the high-pressure cylinder through a reheater pipeline; and the high-pressure cylinder is connected with a condenser. According to thethermal coupling power generation system, by means of steam generated by a waste heat boiler for incinerating garbage, the steam is guided into a coal-fired unit thermal system, the efficiency of garbage incineration power generation is improved, and thermal consumption and power generation consumption are reduced.

Description

Technical field: [0001] The invention relates to the technical field of boiler power generation, in particular to a thermodynamic coupling power generation system of medium-pressure steam in a waste incinerator and a coal-fired unit. Background technique: [0002] Garbage furnace incineration, for the purpose of disposing of garbage, uses the heat of incineration to arrange a waste heat boiler with a superheater in the furnace. The working medium circulation efficiency of this waste heat furnace is very low, about 20%, which is far lower than that of large coal-fired units of about 46%. efficiency. At the same time, there are many problems to be solved in the garbage furnace, such as high equipment investment, high-temperature corrosion of the heating surface, low-temperature corrosion of the tail, fly ash slagging, low dioxin flue gas emission indicators, and serious pollution that cannot be removed. Invention content: [0003] In order to overcome the above problems, th...

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Problems solved by technology

[0002] Garbage furnace incineration, for the purpose of disposing of garbage, uses the heat of incineration to arrange a waste heat boiler with a superheater in the furnace. The working medium circulation efficiency of this waste heat furnace is very low, about 20%, which is far lower than that of large coal-fired units of about 46%. efficiency

At the same time, there are many problems to be solved in the garbage furnace, such as high equipment investment, high-temperature corrosion of the heating surface, low-temperature corrosion of the tail, fly ash slagging, low dioxin flue gas emission indicators, serious pollution that cannot be removed, etc.

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