Double-effect steam turbine power generation system

Abstract

The invention relates to the technical field of thermal power generation, in particular to a double-effect steam turbine power generation system which comprises a first circulation pipeline, a second circulation pipeline, a third circulation pipeline and a fourth circulation pipeline. The second circulating pipeline comprises a first turbine, a reheater, a second turbine, a condenser body, a compressor and a heater body which are in circulating communication; the at least one-stage low-pressure heater and the at least one-stage high-pressure heater are arranged in parallel with the liquid side of the condenser body; the steam turbine set is communicated with a steam pipeline, the hot side of the heater body is installed on the steam pipeline in series, and the hot side of the reheater is installed on at least one steam pipeline communicated with the high-pressure heater in series. The first circulating pipeline and the second circulating pipeline are subjected to coupling heat exchange, so that the temperature of a backflow medium output from the high-pressure heater can be increased, the backheating steam extraction superheat degree is reduced, the heat exchange loss is reduced, and the energy consumption of a turbine unit power generation system is reduced.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a double-effect steam turbine power generation system. Background technique [0002] Coal-fired power generating units consume a large amount of coal resources and cause environmental pollution while providing large-scale power security. Therefore, the efficient and clean operation of coal-fired units can not only save valuable coal resources, improve energy conversion and utilization efficiency, reduce the energy cost of thermal power companies, but also improve environmental quality and reduce pollution emissions. [0003] As the core part of the steam turbine, the performance of the thermal system has a direct impact on the energy consumption, efficiency, and emissions of the steam turbine. In the thermal system of the steam turbine unit in the prior art, the steam turbine unit is driven to rotate through the steam cycle, thereby driving the generator to outp...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the thermal energy loss in the steam turbine power generation system in the prior art causes the system energy consumption to increase, thereby providing a double-effect steam turbine power generation system

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