System and method for energy cascade utilization of small steam turbines in thermal power plants

A technology for small steam turbines and thermal power plants, applied in steam engine installations, mechanical equipment, machines/engines, etc., can solve the problems of difficulty in fully utilizing steam energy, high requirements for the design and manufacture of supporting main steam turbines and safe operation, and is easy to popularize and apply. , Reduce the requirements for design and manufacture and safe operation, the effect of simple structure
CN104989470BActive Publication Date: 2016-10-26HUADIAN ELECTRIC POWER SCI INST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUADIAN ELECTRIC POWER SCI INST CO LTD
Publication Date
2016-10-26

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Abstract

The invention relates to an energy gradient utilization system and method for a small turbine of a thermal power plant. Currently, steam feed pump systems and steam induced draft fan systems have many defects. The system comprises a main steam turbine, a main steam feeding pipe, a main steam feeding regulation valve, a feed pump drive small turbine, a feed pump connection shaft and a feed pump. The system is characterized by further comprising a first steam feeding pipe, a first regulation valve, a first induced draft fan drive small steam turbine, a first induced draft fan connection shaft and a first induced draft fan, wherein one end of the first steam feeding pipe is connected to the feed pump drive small turbine, the other end of the first steam feeding pipe is connected to the first induced draft fan drive small steam turbine, and the first regulation valve is arranged on the first steam feeding pipe. The method comprises the steps that the main steam turbine only provides steam for the feed pump drive small turbine directly, and then a part of steam obtained after acting in the feed pump drive small turbine is directly pumped to the induced draft fan drive small steam turbine to drive the small turbine to act. The energy gradient utilization system and method can conveniently and effectively achieve energy gradient utilization.
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Description

technical field

[0001] The invention relates to an energy cascade utilization system and method, in particular to an energy cascade utilization system and method for a small steam turbine in a thermal power plant, which can rationally arrange the steam system of the small steam turbine so as to achieve high energy utilization. Background technique

[0002] At present, most of the feed water pumps and induced draft fans for generating sets in thermal power plants are driven by electric motors, and some are driven by small steam turbines. Electric motor-driven feed water pumps and induced draft fans, whose electric energy comes from the substation electricity of the thermal power plant, this method increases the substation electricity consumption and reduces the on-grid electricity consumption. The use of small steam turbines to drive feed water pumps and induced draft fans can effectively reduce the power consumption rate of thermal power plants, reduce power generation costs...

Claims

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