Axial steam exhaust structure of low-power low-grade heat energy steam turbine

By adopting the axial exhaust structure and volute diversion blade design in a low-power, low-grade thermal energy turbine, the problems of large flow resistance and high space construction cost in the steam exhaust structure of the turbine are solved, and efficient steam emission and flue gas emission are achieved.

CN119712260AActive Publication Date: 2025-03-28QINGDAO JIENENG STEAM TURBINE GROUP CO LTD
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Patent Information

Application Number
CN202510238809.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-03
Publication Date
2025-03-28
Estimated Expiration
2045-03-03

AI Technical Summary

Technical Problem

The existing steam exhaust structure of the turbine has problems such as large flow resistance, condensate endangering the safety of the rotor, high platform height and high space construction costs.

Method used

The axial steam exhaust structure of a low-power, low-grade thermal energy turbine is adopted, and the rear cylinder holder ring enters the exhaust cylinder, allowing the steam to flow axially and reduce flow resistance. Set up a volute shell and a diversion blade, which guides the steam to mix it inside the volute shell to form a stream of steam to improve the exhaust efficiency.

Benefits of technology

It reduces steam flow resistance, improves exhaust efficiency, avoids condensate water jeopardizes the safety of the rotor, reduces space construction costs, and quickly discharges flue gas through the micro negative pressure exhaust structure.

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Abstract

The invention discloses an axial steam exhaust structure of a low-power low-grade heat energy steam turbine, and relates to the technical field of steam exhaust of steam turbines, the axial steam exhaust structure comprises a rear cylinder holding ring, a steam exhaust cylinder, a rear cylinder bearing seat and a volute, the inner cavity wall of the volute is fixedly connected with a plurality of guide vanes in an array mode in the axial direction of the volute, and the guide vanes gradually extend from one axial end of the volute to the other axial end of the volute. And the outer contour of the guide vane is spiral. Steam of the steam turbine enters the exhaust hood from the rear cylinder holding ring, so that the steam can flow in the axial direction of the steam turbine, the flow resistance of the steam is reduced, in addition, the volute and the guide vanes are arranged, the guide vanes can guide the exhausted steam, and the steam in different radial directions of the exhaust hood is guided by the guide vanes, so that the exhaust hood is more stable. Therefore, steam in multiple directions can flow towards the radial inner side of the volute in a guiding mode and is finally mixed together, then steam pressure in multiple directions forms a stream of steam after entering the volute, and therefore the steam exhaust efficiency is improved.
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