Wide load high-pressure steam supply system

Abstract

The invention discloses a wide load high-pressure steam supply system which comprises a steam turbine high pressure cylinder and No. 1, No. 2 and No. 3 high pressure heaters; the high pressure cylinder is connected with the No. 1, No. 2 and No. 3 high pressure heaters through steam suction pipes correspondingly; a check valve and an electric valve are arranged on each steam suction pipe; a suctionand external steam supply pipeline is also arranged on the steam suction pipe for connecting the steam turbine high pressure cylinder and the No. 1 high pressure heater; a No. 1 high pressure heaterwater supply bypass and a No. 2 high pressure heater water supply bypass are provided; heat exchangers are arranged on the two water supply bypasses correspondingly; and water supply pipeline electrically operated gates are arranged on the parts, on the two sides of the heat exchangers, of the water supply bypasses correspondingly. The unit on-load range during high voltage heat supply of a steamturbine is widened, the operation economy of a unit is ensured, and the problem that the heating capacity of high pressure steam of the steam turbine is not sufficient when the unit is subjected to depth peak load regulation is solved.

Description

technical field [0001] The invention belongs to the technical field of heat supply for steam turbine generator sets, and relates to a wide-load high-pressure steam supply system. Background technique [0002] As the utilization hours of thermal power units decrease, deep peak shaving of thermal power units becomes more frequent. For thermal power units for industrial steam supply, the reduction in load leads to a decrease in their industrial heating capacity, especially for units that use cold re-steam or hot re-steam for industrial steam supply, which has a greater impact. The main reasons are: [0003] The load of the steam turbine generator set has a great relationship with the external steam supply flow of the steam turbine. The higher the load, the greater the external steam supply flow of the steam turbine for cold or hot reheating, and the more it can meet the flow requirements of the external steam supply of the steam turbine. The lower the load, the smaller the e...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deep peak-shaving problem common in current industrial heating units, the present invention proposes a wide-load high-pressure steam supply system and method, while meeting the economical requirements of the unit

Images