Afterburning reheat peaking steam turbine unit

Abstract

The invention discloses an afterburning reheat peaking steam turbine unit. The afterburning reheat peaking steam turbine unit comprises a pure oxygen pipeline system, a pure hydrogen pipeline system,a hydrogen combustion chamber, a hydrogen gas turbine and a steam turbine, etc. According to the afterburning reheat peaking steam turbine unit provided by the invention, hydrogen is used for combusting and releasing heat in the combustion chamber and generating high-temperature steam, the high-temperature steam drives the hydrogen gas turbine to do work, after the hydrogen gas turbine does work and is cooled down, the steam is supplemented to a steam turbine generator set to continue to do work. At the same time, the steam after combustion in the hydrogen combustion chamber can be directly supplemented into the steam turbine generator set after being cooled by the mixed steam to continue to do work. Therefore, the high-temperature steam is generated through the hydrogen afterburning mode,and finally, the high-temperature steam is supplemented into the steam turbine generator set, equivalently, single reheat is realized, the overall cycle efficiency is improved, and meanwhile, the peaking capability of a whole thermal generator set is greatly improved by starting and stopping an afterburning system.

Description

technical field [0001] The invention belongs to the field of power station gas turbines and steam turbine systems, and in particular relates to a post-combustion reheating peak-shaving steam turbine unit. Background technique [0002] With the continuous increase of the proportion of new energy in my country, the total amount of wind and solar curtailment is increasing, the demand for power grid peak regulation is increasing, and the requirements for peak regulation speed are also getting higher and higher. At the same time, the requirements for energy saving and consumption reduction are also increasing year by year. improve. [0003] Increasing the peak-shaving capacity on the power supply side and improving the peak-shaving speed are the key to solving the coordination between the network and the source, ensuring the security of the power grid, and improving the utilization rate of new energy. However, the existing thermal power units are limited by the capacity of the eq...

AI Technical Summary

Problems solved by technology

However, the existing thermal power units are limited by the capacity of the equipment, and the peak-shaving capacity is generally within the range of 40% to 100% of the rated load. There is still a certain deficiency in meeting the regional peak-shaving needs. When the power consumption is low, the overall output is still too high. , resulting in the abandonment of wind and light; at the peak of power consumption, the overall output is still insufficient, and it is difficult to meet the regional power demand

In the first half of 2016, due to the insufficient peak-shaving capacity of the power supply side in my country, the abandoned electricity of wind power alone reached 32.3 billion kWh, resulting in huge energy waste

Limited by the technical difficulty of specific implementation and operational reliability, the reheating times of thermal power units have been unable to increase for a long time

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