Converter afterheat and steam compensation combustion type generating system

Abstract

The invention discloses a converter afterheat and steam compensation combustion type generating system which comprises a converter vaporization flue, a converter steam pocket, a heat accumulator, a compensation combustion boiler, a turbine generator set, a steam condenser and deaerator, wherein the steam outlet of the converter steam pocket is connected with a steam inlet pipe of the heat accumulator, a steam outlet pipe of the heat accumulator, a steam outlet pipe of a steam pocket of the compensation combustion boiler and a steam inlet pipe of an overheater of the compensation combustion boiler; the steam outlet of the overheater is connected with the steam inlet of the turbine set through a pipeline; a steam exhaust port of the turbine set is connected with the steam condenser; the steam condenser is connected with the inlet of a low-temperature economizer of the compensation combustion boiler through a condensation pump and a pipeline; the outlet of the low-temperature economizer is connected with a water inlet pipe of the deaerator; and the deaerator is connected with the steam pocket through a pipeline and a feed pump. By the system, intermittent and instable saturated steam produced by a converter is converted into continuous, stable and high-quality overheated steam, so that secure, economic and efficient running of a turbine can be guaranteed; therefore, the generating efficiency and the economic benefit can be improved.

Description

technical field [0001] The invention relates to a steam turbine generator system, in particular to a converter waste heat steam power generation system. Background technique [0002] During the steelmaking process of the converter, the converter vaporization flue will generate a large amount of saturated steam. Since the converter steelmaking process is an intermittent production operation, and steam is only generated during the converter blowing process, the steam parameters produced by the converter change periodically, and the range of change is very large. When there is no blowing, the steam The output is zero. During blowing, the instantaneous steam production per ton of steel is about 365Kg. For a 120-ton converter, the peak steam production is above 44 tons / hour. The current method of using this part of steam for power generation is to first incorporate the steam into the heat accumulator to reduce the fluctuation range, and then use the saturated steam generator set...

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Problems solved by technology

[0004] 2. The steam is saturated steam. When it fluctuates greatly, the water content is very large, which brings great hidden dangers to the safe production of steam turbines.

[0005] 3. The steam enthalpy is low, and the steam consumption is relatively large during power generation, usually around 8kWh / kg.

[0006] 4. When the number of converters is less than 3, due to converter failure maintenance and other reasons, it will cause frequent shutdown of the steam turbine unit, which will have a greater impact on the safety and power generation efficiency of the steam turbine generator set

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