Steam extraction back pressure type feed pump turbine back pressure adjusting system and method

A feedwater pump steam turbine and back pressure regulation technology, which is applied to steam engine devices, mechanical equipment, machines/engines, etc., can solve the problems of safe operation control and economic control under variable load conditions that are not enough to completely solve

Pending Publication Date: 2020-03-24
DATANG YUNCHENG POWER GENERATION CO LTD +1
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Problems solved by technology

[0005] Due to the steam intake adjustment of the small steam turbine with back-pressure extraction and the power balance of the shaft

Method used

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  • Steam extraction back pressure type feed pump turbine back pressure adjusting system and method

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Embodiment Construction

[0022] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] ginseng figure 1 As shown, this embodiment provides a steam extraction back pressure type feed water pump steam turbine back pressure regulation system, including feed water pump small steam turbine 1, driving steam pipeline 2, regenerative steam extraction pipeline 3, regenerative steam extraction pipeline Regulating valve 4, converging header 5, steam extraction and supplementary steam pipeline regulating valve 6, discharge pipeline regulating valve 7, back pressure controller 8; driving steam pipeline 2 is connected with the small steam turbine 1 of the feed water pump, which is used for the main steam turbine A certain section of extraction steam is sent to the...

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Abstract

The invention relates to a steam extraction back pressure type feed pump turbine back pressure adjusting system and method. The system comprises a feed pump small turbine, a driving steam pipeline, aregenerative steam extraction pipeline, a regenerative steam extraction pipeline adjusting valve, a converging header, a steam extraction and supplementing pipeline adjusting valve, a discharging pipeline adjusting valve and a back pressure controller. The driving steam pipeline is connected with a small steam turbine; middle extraction steam of the small steam turbine enters a regenerative heaterthrough the regenerative steam extraction pipeline; exhaust gas of the small steam turbine enters the converging header; the exhaust gas of the small steam turbine enters the regenerative heater through the regenerative steam extraction pipeline adjusting valve; extracted steam from a main steam turbine enters the converging header through a regulating valve; the converging header is connected with a condenser through the regulating valve; and the extracted steam from the main steam turbine is connected with the regenerative steam extraction pipeline adjusting valve through the regulating valve and enters the regenerative heater. According to the system and method, start-stop of the small steam turbine and back pressure stable control of normal operation can be ensured, and effective steam extraction and backheating of the feed water heater are carried out while the small steam turbine normally drives the feed water pump.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and in particular relates to a back pressure regulating system and method for a steam extraction back pressure type feed water pump steam turbine. Background technique [0002] With the development of high-parameter and large-capacity generating units with one million primary reheating and two-time reheating, ultra-supercritical units with high parameters of 35MPa inlet steam parameters are becoming research objects, which can further improve the cycle thermal efficiency of the unit and further promote Energy conservation. [0003] In order to reduce the superheat degree of extraction steam recovery under high parameter conditions, an extraction steam back pressure feedwater pump turbine unit system is proposed. That is, the feedwater pump is driven by setting a steam extraction back pressure small steam turbine, that is, at the same time, the steam extraction in the middle of t...

Claims

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Application Information

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IPC IPC(8): F01K13/02F01K7/38
CPCF01K13/02F01K7/38F01K7/345
Inventor 张振华刘岩周雅君杜未李燕平杨晋杨腾夏洪刚王开晶郜玉森任庆鹏刘帅王明刚张凯张超孙德创戴立洪白公宝张志刚王振彪彭良张莉高智溥
Owner DATANG YUNCHENG POWER GENERATION CO LTD
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