Steam turbine supercharger

Abstract

The invention relates to a steam turbine supercharger. The steam turbine supercharger comprises a turbine impeller and a compressor impeller which are arranged oppositely. One side of the radial direction of the turbine impeller communicates with a turbine inlet through a turbine flow regulation nozzle. One side of the axial direction of the turbine impeller is provided with a turbine outlet. Theturbine impeller and the compressor impeller are supported through a supercharger arranged vertically and fixed through a machine base. The outer side of the compressor impeller is sleeved with a supercharger case. One side of the radial direction of the compressor impeller communicates with a compressor exhaust volute outlet through a diffuser. One side of the axial direction of the compressor impeller is further provided with a compressor inlet. Through the steam turbine supercharger, the single-set maximum heating load of a steam turbine set is increased. The steam turbine supercharger hasthe good variable working condition regulating characteristics. Compared with a steam jet pressure matcher, the steam turbine supercharger has the advantages that the energy-saving efficiency is doubled, and equivalently, the steam extraction ratio is increased at least by nearly one time; that is, under the same working condition, low-pressure steam can be extracted twice under the condition of the same quantity of high-pressure steam.

Description

Technical field [0001] The invention relates to the technical field of superchargers, in particular to a steam turbocharger. Background technique [0002] In the thermal power industry, in the process of developing cogeneration and promoting the heat supply transformation of pure condensing steam turbine units, the steam parameters that the units can provide do not match the steam parameters required by heat users. At present, the most common technical solution is to extract high-energy steam through measures such as temperature reduction and pressure reduction to match the external steam supply; the slightly better technical solution is to use high-pressure driving steam to spray through the nozzle, and suction low-pressure steam to meet the parameters of external steam supply Claim. The throttling process of the direct temperature reduction and pressure reduction device has produced a large exergy loss, and the steam heat energy is not used in cascades, and energy waste is se...

AI Technical Summary

Problems solved by technology

The throttling process of the direct desuperheating and decompression device produces a large exergy loss, and the heat energy of the steam is not utilized in steps, resulting in serious energy waste; the steam injection pressure matcher improves the grade of the low-pressure steam, so that the heat energy of the high-pressure steam is partially realized. Utilization, but due to the strong mixing process in the device, there is a large irreversible flow loss, and the energy saving efficiency is low.

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