Steam turbine thermalized steam flow single-reheat power and power co-production thermal system

Abstract

The invention relates to a steam turbine thermalized steam flow single-reheat power and power co-production thermal system. According to principles of a thermal power plant and by means of capacity-increasing heating energy-saving transformation of a condensing steam turbine or adjusting steam extraction of a heat supply turbine, internally-thermalized steam flow or externally-thermalized steam flow of a steam turbine of a coal-fired power plant serves as a power steam source of a thermalization peak regulation turbine generator set after single-reheat; by means of control and switching of valves and on the basis that operation functions of an original steam turbine of the coal-fired power plant are not influenced, the condensing steam turbine achieves the function of enhancing backheating effect, a power supply unit achieves the function of stabilizing thermalization load, and therefore potentials of a steam turbine generator unit of the coal-fired power plant are fully developed; the principle that reheat integration action between the thermalized steam flow of the steam turbine and steam improves circulating thermal efficiency is fully used, a thermodynamic cycle of the coal-fired power plant is improved, and the aim of large-scale energy conservation is achieved. The steam turbine generator unit reconstructed or newly built by means of the method can obtain considerable comprehensive benefits in energy conservation and emission reduction of the coal-fired power plant.

Description

technical field [0001] The invention relates to a thermoelectric power generation system, in particular to a thermal system for cogeneration of heat, electricity and electricity once the thermalized steam flow of a steam turbine is used. Background technique [0002] The "Twelfth Five-Year Plan" put forward two binding goals of energy saving and emission reduction for my country's electric power industry. Thermal power units still account for more than 60% of my country's future energy structure. With the optimization of energy structure and the improvement of environmental protection requirements, The requirements for further energy saving and emission reduction are getting higher and higher, and the difficulty is getting bigger and bigger. [0003] Vigorously developing efficient and reliable cogeneration and central heating systems has become an important means of urban energy conservation and environmental protection. It is also an effective method for large-scale energy...

AI Technical Summary

Problems solved by technology

[0006] The present invention is aimed at the problem of increasing the capacity of the condensing steam turbine for heat supply and energy-saving transformation of the thermal power plant and the problem of adjusting the steam extraction and stabilizing the heat supply load of the heat supply steam turbine. The potential of the thermalized steam flow of the main steam turbine in the thermal power plant is regenerated, which has the effect of comprehensive energy saving and emission reduction of the combined cycle of electricity and electricity and combined cycle of heat and electricity.

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