High parameter steam drum intermediate reheating system for waste incineration power generation

Abstract

The invention relates to a high parameter steam drum intermediate reheating system for waste incineration power generation. An intermediate reheater is further arranged in the steam drum, steam generated by a boiler first enters a high pressure cylinder of a steam turbine, the steam drives the high pressure cylinder to do work and enables a generator to generate electricity, the steam from the high pressure cylinder of the steam turbine enters the intermediate reheater for reheating, and then enters a low pressure cylinder of the steam turbine and drives the low pressure cylinder to do work and enables the generator to generate the electricity. The saturated steam in the steam drum is used in the intermediate reheater for reheating the steam after working in the high pressure cylinder of the steam turbine, then returning to the low pressure cylinder of the steam turbine to continue to expand and do the work, so that the cycle thermal efficiency and power generation efficiency are improved. Because the steam drum has certain buffering ability to the boiler loading change, the steam temperature in the steam drum changes little, so that the steam temperature of the intermediate reheater changes smoothly and the range of temperature regulation is small, and the temperature regulation of the intermediate reheater is facilitated. In addition, the steam intermediate reheating processcan reduce the exhaust humidity of the low pressure steam turbine, the working conditions of last stage blades of the steam turbine are improved, and the service life of the steam turbine is prolonged.

Description

technical field [0001] The invention relates to a steam drum heating system for waste incineration power generation, in particular to an intermediate reheating system for a high-parameter steam drum for waste incineration power generation. Background technique [0002] Improving steam parameters is an important way to improve thermal economy of waste incineration power plants. At present, most of the boiler parameters of waste incineration power plants that have been put into operation at home and abroad adopt medium temperature and medium pressure parameters, mainly because of the temperature resistance limit of the steel on the heating surface of the boiler. With the improvement of manufacturing technology, the application of high-temperature corrosion-resistant materials and the improvement of power plant operation and management level, the corrosion resistance of the heating surface of the boiler has been further strengthened, and the power generation income brought abou...

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Problems solved by technology

[0004] At present, steam intermediate reheating technology has been applied to waste incineration power generation systems. Chinese patent CN201620633802.0 published "a high-parameter waste incineration boiler with reheating". Reheating steam with waste heat, because the waste incineration flue ga

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