Pressurization main machine coaxial driving feed water pump system comprising pure condensing steam extraction small steam turbine

A technology of coaxial drive and water supply pump, which is applied in the direction of machines/engines, mechanical equipment, etc., can solve the problems of high investment, low return on investment, and unfeasible economic aspects of the overall renovation project
CN105822360AActive Publication Date: 2016-08-03国能浙江北仑第一发电有限公司 +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
国能浙江北仑第一发电有限公司
Publication Date
2016-08-03

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Abstract

The invention provides a pressurization main machine coaxial driving feed water pump system comprising a pure condensing steam extraction small steam turbine. The pressurization main machine coaxial driving feed water pump system is additionally provided with a second back pressure steam extraction steam cylinder. The steam inlet end of the second back pressure steam extraction steam cylinder is connected with the steam outlet end of a high pressure cylinder. The steam outlet end of the second back pressure steam extraction steam cylinder is connected with the water inlet end of a condensate pump after steam is condensed through a second condenser. The pressurization main machine coaxial driving feed water pump system comprising the pure condensing steam extraction small steam turbine can further improve the thermal efficiency of electricity generation and reduce electricity supply coal consumption; and meanwhile, the unit output is increased to generate more electricity, and the rate of return on investment is increased.
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Description

technical field

[0001] The invention relates to a thermodynamic system coaxially driven by a feedwater pump and a front-end unit, in particular to a coaxially driven feedwater pump system of a supercharged main engine including a small pure condensing steam extraction unit. Background technique

[0002] In order to improve the efficiency of thermal power generation units with low parameters such as subcritical, a double-reheat front-end steam turbine technology is currently proposed. For low-parameter turbines, a high-parameter front cylinder is added. By increasing the main steam parameters of thermal power units, and adopting Secondary reheating achieves the purpose of improving the overall thermal cycle efficiency.

[0003] However, using this technology to upgrade subcritical low-parameter thermal power units requires replacement of new secondary reheat boilers, addition of front cylinders, replacement of heaters and other main and auxiliary equipment. The overall transf...

Claims

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