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Low-nitrogen combustion control method and system based on secondary air door air regulation control

A secondary damper, low-nitrogen combustion technology, applied in the combustion method, combustion control, air supply adjustment and other directions, can solve the problem of the model deviating from the actual operating conditions and so on

Active Publication Date: 2014-09-24
YANTAI LONGYUAN POWER TECH
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Problems solved by technology

The error of the data used in the modeling itself is likely to cause the model to deviate from the actual operating conditions and inhibit the function of the product

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  • Low-nitrogen combustion control method and system based on secondary air door air regulation control

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Embodiment Construction

[0058] 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.

[0059] 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.

[0060] At the same time, it should be understood that, for the convenience of d...

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Abstract

The invention discloses a low-nitrogen combustion control method and system based on secondary air door air regulation control. An intelligent air regulation server determines the quality state of coal burned at present according to collected coal quality parameters, selects a corresponding air distributing scheme according to the quality state of the coal and an operating mode of a coal mill and sends the air distributing scheme to a controller; the controller controls all secondary air doors of a coal-fired boiler according to the air distributing scheme sent by the intelligent air regulation server; the intelligent air regulation server determines a corresponding secondary air door correcting scheme according to collected current nitrogen oxide emission concentration and a current nitric oxide reference value, and sends corresponding control instructions to the controller; the controller corrects the secondary air doors according to received control instructions so as to reduce the emission of nitric oxide. The secondary air doors are controlled according to the operating state of the coal-fired boiler, and thus low-nitrogen combustion control is effectively achieved.

Description

technical field [0001] The invention relates to the field of optimal combustion control of boilers, in particular to a low-nitrogen combustion control method and system based on secondary damper air adjustment control. Background technique [0002] Nitrogen oxide (NOx) emission characteristics of large coal-fired power plant boilers are of increasing concern. According to the traditional distribution style of "big three zones" (main combustion zone, reduction zone and burnout zone), the industry at home and abroad has made remarkable achievements. However, when further deep denitrification is carried out, a series of outstanding problems have appeared, mainly including the decrease of carbon burnout rate, the increase of carbon monoxide CO emission, and the decrease of boiler efficiency; a strong reducing atmosphere locally appears in the furnace, resulting in Furnace slagging, high temperature corrosion tendency of water wall increases. As a result, the traditional extens...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N3/00
Inventor 蔡芃吕霞张巍赵超王海鹏隋海涛付春磊潘小龙
Owner YANTAI LONGYUAN POWER TECH
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