Steam turbine generator set with direct combustion heating function

Abstract

The invention provides a steam turbine generator set with a direct combustion heating function. The steam turbine generator set comprises a boiler and a steam turbine, wherein a combustion chamber isarranged between the boiler and the steam turbine, an outlet of the boiler is connected to an inlet of the combustion chamber, and an outlet of the combustion chamber is connected to a steam inlet ofthe steam turbine; and the combustion chamber is arranged at the steam inlet of the steam turbine, the combustion chamber is arranged close to the steam turbine as much as possible, or the combustionchamber and the steam turbine are integrally designed, so that the length of a connecting channel between the combustion chamber and the steam turbine is reduced, and the use amount of high-end materials is reduced. The invention further provides a working method for the steam turbine generator set with the direct combustion heating function. According to the steam turbine generator set and the working method, the direct combustion heating function of the combustion chamber is added before the steam turbine, so that the steam temperature is increased; a boiler with the temperature of 600 DEG Ccan be adopted, then steam is introduced into the combustion chamber to be subjected to direct combustion heating to reach 700 DEG C or more, so that the advanced ultra-supercritical parameters of 700 DEG C are achieved; and the team turbine generator set and the working method can also be applied to upgrading and transformation of existing subcritical, supercritical, ultra-supercritical steam turbine generator sets, and power generation cost is reduced.

Description

technical field [0001] The invention relates to a steam turbine generator set with direct combustion heating and a working method thereof, belonging to the technical field of thermal power generation. Background technique [0002] Coal-fired power generation is one of the main power supply methods in my country, and it will still occupy the largest share of power generation at present and for a long period of time in the future. In order to meet the requirements of the national energy conservation and emission reduction policy, on the one hand, it is necessary to speed up the construction of units with higher parameters, that is, the next generation of 700°C ultra-supercritical units; Performance, including subcritical, supercritical and ultra-supercritical units. Because nickel-based high-temperature materials are very expensive, the cost of 700°C ultra-supercritical units remains high and lacks investment value. The construction plan of related demonstration power plants ...

AI Technical Summary

Problems solved by technology

However, the existing coal-fired power generation units use boilers to indirectly heat steam. Due to the material properties, it is difficult to further increase the steam temperature, let alone reach the high temperature level of gas turbines.

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