Peak shaving method of thermal power generating unit

A technology for thermal power units and peak regulation, which is applied in steam generation, lighting and heating equipment, control systems, etc., and can solve problems such as affecting the normal power generation of power plants, tripping of generator sets, and difficulty in adapting to peak regulation requirements.

Active Publication Date: 2020-02-11
CHINA SHENHUA ENERGY CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few technical materials for deep peak regulation of thermal power units with a rated load of 30% or below, especially for thermal power units with a rated load above 1000MW, it is difficult to reduce the load, and combustion instability is very likely to occur during the load reduction process , Boiler fire extinguishing sit

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  • Peak shaving method of thermal power generating unit
  • Peak shaving method of thermal power generating unit
  • Peak shaving method of thermal power generating unit

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Embodiment Construction

[0040] It should be noted that the embodiments of the present invention and the features of the embodiments can be combined with each other if there is no conflict.

[0041] The present invention provides a method for peak shaving of a thermal power unit. The thermal power unit includes a boiler, a boiler denitration system, a steam turbine, and a steam and water system connecting the boiler and the steam turbine. The boiler includes multiple coal mills, each The coal mill includes a dynamic separator, a burner, and an air supply system, and the air supply system includes a primary air system and a secondary air system, where, see figure 1 ,

[0042] The peak shaving method includes:

[0043] The first step is to adjust the dynamic separator of the coal mill so that the fineness of pulverized coal is less than or equal to the predetermined value of fineness of pulverized coal, so as to ensure that the pulverized coal can be fully and stably burned, and to avoid combustion caused by t...

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Abstract

The invention relates to the field of peak shaving of thermal power generating units, and discloses a peak shaving method of a thermal power generating unit. The peak shaving method comprises the following steps that firstly, dynamic separators of coal mills are adjusted, so that the fineness of the pulverized coal is less than or equal to the predetermined value of the fineness of the pulverizedcoal; secondly, a condensate pump of a steam and water system is enabled to exit the automatic mode, and the outlet pressure of the condensate pump is manually adjusted to the first pressure predetermined value; thirdly, primary air systems are adjusted; fourthly, the temperature of coal mill outlets of the dynamic separators is adjusted to the first predetermined temperature; fifthly, the openingdegree of secondary windshield plates of secondary air systems is adjusted to the first predetermined range; and sixthly, the load of the thermal power generating unit is reduced to the predeterminedload according to the predetermined speed, and the predetermined speed is less than or equal to 1.5% of rated load per minute. By the adoption of the peak shaving method of the thermal power generating unit, the peak shaving capacity of the thermal power generating unit can be remarkably improved.

Description

Technical field [0001] The invention relates to the field of peak shaving of thermal power units, in particular to a method for peak shaving of thermal power units. Background technique [0002] With the increasing peak-to-valley difference of power load and the large-scale access of random and intermittent renewable energy sources, the power system has put forward higher requirements on the peak-shaving capacity of coal-fired power plants. Technical research on deep peak-shaving of coal power plants is required. It is of great significance to improve the peak shaving capacity of thermal power units, adapt to grid requirements, and improve the economy and environmental protection of thermal power units. [0003] At present, there are few technical data for deep peak shaving of thermal power units with a rated load of 30% and below, especially for thermal power units with a rated load above 1000MW, which are difficult to reduce the load, and combustion instability is very easy to oc...

Claims

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Application Information

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IPC IPC(8): F22B35/00
CPCF22B35/00
Inventor 刘贵生
Owner CHINA SHENHUA ENERGY CO LTD
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