Fuel cutting method for multi-fuel blending combustion unit under run back (RB) condition

A fuel co-combustion and unit technology, which is applied in the direction of using multiple fuel combustion, combustion methods, block fuel and liquid fuel combustion, etc., can solve the problems of water supply control requirements and high response, large water supply buffer volume, etc., to achieve Satisfy boiler heat load demand, good load fluctuation, good effect effect

Active Publication Date: 2015-05-13
SHANGHAI BAOSIGHT SOFTWARE CO LTD
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  • Description
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Problems solved by technology

The former has a steam drum buffer in feed water control, and in the event of a large disturbance of the unit RUNBACK, the feed water buffer is large, while the DC furnace has higher requirements and responses for feed water control because there is no steam drum buffer

Method used

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  • Fuel cutting method for multi-fuel blending combustion unit under run back (RB) condition
  • Fuel cutting method for multi-fuel blending combustion unit under run back (RB) condition
  • Fuel cutting method for multi-fuel blending combustion unit under run back (RB) condition

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Embodiment Construction

[0044] The technical solutions of the present invention will be further explained below in conjunction with the drawings and embodiments, but the following content is not intended to limit the protection scope of the present invention.

[0045] The present invention uses the DCS system (distributed control system) to analyze and identify the fault tripping of important auxiliary equipment (RUNBACK working condition, referred to as RB working condition), and then adopts a safe process strategy and programming to realize fully automatic stable unit operation; its The key technology is based on the mixed combustion of various fuels in Unit 4 of Baosteel Power Plant; 18 composite gas burners, divided into upper, middle and lower layers, and the characteristics of the left and right walls facing each other, it gives how to correctly identify and diagnose each gas burner. According to different RB working conditions, different boiler fuel cutting schemes are adopted according to diff...

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Abstract

A fuel cutting method for a multi-fuel blending combustion unit under a run back (RB) condition is a fuel cutting scheme developed aiming at self characteristics of a fourth unit of a Bao steel power plant (a fuel unit) and different from common coal-fired units in response to unit auxiliary engine faults. A distributed control system (DCS) is adopted to analyze and recognize major auxiliary engine fault trip (the RB condition short for the run back condition), then a safe process strategy is adopted, and programming is conducted to achieve full-automatic stable unit operation. The method can well respond to unit load fluctuation aiming at various RB conditions and load disturbance of different degrees to meet the heat load requirement of a boiler and achieve a good effect in the fourth unit which is a special fuel unit of the Bao steel power plant.

Description

technical field [0001] The invention relates to a method in the technical field of power station automation, in particular to a method for cutting off fuel under the RUNBACK working condition of a multi-fuel co-firing unit (referred to as RB working condition for tripping due to failure of important auxiliary equipment). Background technique [0002] Unit 4 of Baosteel Power Plant is a subcritical, once-reheated, direct current, micro positive pressure, tower boiler, and unitary turbogenerator unit. Unit 4 of Baosteel Power Plant is the world's first unit with a maximum fuel consumption of 1031kNm 3 / h flow BFG (main fuel) generator set, the fuel system is equipped with three double-speed BFG booster fans, equipped with 18 composite gas burners, arranged in three layers, and each layer has six burners, respectively Distributed on the front and rear walls of the boiler. The main fuel is BFG, and the fuel system is equipped with three two-speed BFG booster fans. The boiler ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B35/00F23N5/00F23C5/08
Inventor 杨晓伟钱名何晓峰卫江鹏洪涛任君何心毅
Owner SHANGHAI BAOSIGHT SOFTWARE CO LTD
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