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Steam source switching method when used in thermal power unit fcb

A technology for thermal power units and steam sources, which is applied to mechanical equipment, steam engine devices, engine components, etc., and can solve problems such as instability in the switching process of boiler steam sources.

Active Publication Date: 2021-05-14
广东红海湾发电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a steam source switching method for thermal power unit FCB, which solves the problem of unstable boiler steam source switching process when the unit is FCB, and improves the reliability of FCB action at the same time

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  • Steam source switching method when used in thermal power unit fcb
  • Steam source switching method when used in thermal power unit fcb
  • Steam source switching method when used in thermal power unit fcb

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Embodiment Construction

[0027] In order to describe the technical content and structural features of the present invention in detail, further description will be given below in conjunction with the implementation and accompanying drawings.

[0028] see Figure 1 to Figure 3 , the embodiment of the present invention discloses a steam source system 100 for a thermal power unit, including a small steam turbine 11, a steam-driven feed water pump 12, a four-stage steam extraction system 13, an auxiliary steam system 14, a reheating and cold-stage steam system 15 and Control system 16, the small steam turbine 11 is connected to the steam-driven feed water pump 12, the small steam turbine 11 is connected to the main steam inlet pipeline 1, and the main steam inlet pipeline 1 is provided with a main steam valve 17 and a small machine low-pressure regulating valve 18 in sequence along the steam inlet path, The main steam inlet pipeline 1 is connected to the auxiliary steam system 14 through the auxiliary stea...

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Abstract

The invention discloses a steam source switching method for a thermal power unit FCB, which includes: when the thermal power unit is running alone, in bad natural weather or in peak power consumption, controlling the electric door of the auxiliary steam supply unit to open in advance; if the The electric door of the auxiliary steam supply machine is not opened in advance, when the FCB operates, the electric door of the auxiliary steam supply machine is controlled to open; when the FCB operates, if the electric door of the auxiliary steam supply machine is not opened, the overshoot control Open the high-pressure valve of the small machine to connect the cold resupply steam source to the small steam turbine; when the FCB operates, open the cold resupply auxiliary steam adjustment door to the preset opening to maintain the pressure stability of the auxiliary steam main pipe; when the FCB operates, open The steam powered feed water pump recirculates to switch to single steam powered feed water pump operation and keeps the other steam powered feed water pump running for standby.

Description

technical field [0001] The invention relates to the field of thermal power generation, in particular to a steam source switching method used in a thermal power unit FCB. Background technique [0002] With the expansion of power grid capacity, countries around the world are paying more and more attention to the safety of power grid operation, and requiring generator sets to have FCB function is an important measure to ensure the safe and stable operation of power grids and generator sets. However, at the beginning of the design of mainstream units in my country, the FCB function was not considered. If the FCB function is to be realized on the basis of the existing units, the technical difficulty is relatively large, especially in the rapid water reduction during the FCB process. There are two main difficulties in the rapid water reduction control technology in FCB. One of them is the instability of the steam source switching process of small and medium steam turbines. Auxili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K13/02F01D17/00
CPCF01D17/00F01K13/02
Inventor 王晓晖袁宏伟朱军张春生熊凯左正涛胡文平吴建杜黎宾刘全
Owner 广东红海湾发电有限公司