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Feedback-based low-nitrogen combustion control method and system

A low-nitrogen combustion and controller technology, applied in combustion methods, controlled combustion, lighting and heating equipment, etc., can solve the problem that a single air distribution card no longer adapts to the actual situation, NOx emissions increase, and the expected effect cannot be achieved, etc. question

Active Publication Date: 2016-06-15
YANTAI LONGYUAN POWER TECH
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Problems solved by technology

[0004] The problems caused by the secondary air distribution according to the air distribution card, on the one hand, are poor adaptability to the actual combustion conditions. When the load, coal quality and the operation mode of the coal mill change, the actual combustion environment in the furnace changes greatly At this time, the single air distribution card obtained through the thermal test is no longer suitable for the actual situation; to the desired effect
Both of these aspects lead to higher NOx emissions

Method used

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  • Feedback-based low-nitrogen combustion control method and system
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  • Feedback-based low-nitrogen combustion control method and system

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0047] The relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0048] At the same time, it should be understood that, for the convenience of d...

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Abstract

The invention discloses a feedback-based low-nitrogen combustion control method and system. Among them, the intelligent air conditioning server determines the current coal quality status that is being burned according to the collected coal quality parameters, and selects the air distribution scheme corresponding to the coal quality status, and the controller controls each damper of the coal-fired boiler according to the air distribution scheme. to carry out feed-forward control; the intelligent air conditioning server determines the separate overburning air SOFA damper correction scheme according to the currently collected nitrogen oxide emission concentration and the current nitrogen oxide reference value, and the controller adjusts the SOFA damper according to the SOFA damper correction scheme. Make corrections for feedback control to reduce NOx emissions. By adopting the adjustment method of feedforward and feedback, it can ensure the economical and environmental protection optimization operation of the boiler under the condition of changing environmental factors.

Description

technical field [0001] The invention relates to the field of boiler optimization combustion control, in particular to a feedback-based low-nitrogen combustion control method and system. Background technique [0002] In recent years, the state has promulgated the emission standards of nitrogen oxides (NOx) for coal-fired power plants, and also clearly stipulates that low-nitrogen combustion technology should be the preferred technology for the control of nitrogen oxides in coal-fired power plants. Against this background, domestic coal-fired power plants have successively carried out dual-scale low-nitrogen combustion transformation projects based on secondary air redistribution. After the dual-scale low-nitrogen device is transformed, the combustion characteristics in the furnace change, but the air distribution scheme of the secondary air is fixed, and the air distribution scheme cannot be adjusted synchronously under different loads, coal quality and coal mill operation mo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23N3/06
Inventor 喻玫吕霞张巍蔡芃赵超王海鹏隋海涛范国朝付春磊潘小龙任旻
Owner YANTAI LONGYUAN POWER TECH
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