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Boiler combustion optimization method and system based on air/pulverized coal and CO online monitoring

A boiler combustion and optimization method technology, which is applied in the direction of combustion method, combustion control, air supply adjustment, etc., can solve the problem of single adjustment means and can not reflect the combustion situation in the furnace well, and achieve clear adjustment goals and control Various ways to expand the effect of combination

Active Publication Date: 2021-03-19
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, this method has a single adjustment method, and the tail CO cannot reflect the combustion situation in the furnace well.

Method used

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  • Boiler combustion optimization method and system based on air/pulverized coal and CO online monitoring
  • Boiler combustion optimization method and system based on air/pulverized coal and CO online monitoring
  • Boiler combustion optimization method and system based on air/pulverized coal and CO online monitoring

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0030] see figure 1 and image 3 , the present invention provides a boiler combustion optimization method based on air powder and CO online monitoring, the method includes steps S1-S4.

[0031] The present invention takes a 600MW unit in a certain power plant as an example to elaborate. The boiler is a π-type front and rear wall-contrasting boiler equipped with 6 coal mills, and one coal mill...

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Abstract

The invention belongs to the related technical field of combustion optimization, and discloses a boiler combustion optimization method and system based on air / pulverized coal and CO on-line monitoring. The method comprises the steps of acquiring the primary air / pulverized coal concentration, the primary air flow velocity and the CO concentration at multiple measurement points in a hearth in real time; respectively acquiring the corresponding relationship between the CO concentration and the boiler operation comprehensive cost, the primary air / pulverized coal concentration, the flow velocity and the secondary air air door opening degree matrix under multiple working conditions; acquiring threshold ranges of the CO concentration, the primary air / pulverized coal concentration and the flow velocity under the various working conditions and the secondary air air door opening degree optimization interval by taking the optimal boiler operation comprehensive cost as a standard; and detecting the primary air / pulverized coal concentration, the primary air flow velocity and / or the secondary air air door opening degree matrix when the CO concentration or the primary air / pulverized coal concentration or the primary air flow velocity monitored in real time is not within the corresponding threshold range. According to the method and the system, accurate adjustment of the boiler combustion sideis realized by monitoring the CO concentration of the boiler side and jointly adjusting the parameters of primary air and secondary air.

Description

technical field [0001] The invention belongs to the technical field related to combustion optimization, and more specifically relates to a boiler combustion optimization method and system based on air powder and CO online monitoring. Background technique [0002] In thermal power plants, the stability, safety and economy of boiler operation are regarded as the top priority in the generation process, so the combustion of boilers has attracted much attention. During the combustion process, the concentration and flow rate of the primary air pulverized coal play a very important role in the safe and stable operation of the boiler. Center deviation and other problems, which will cause local coking and high temperature corrosion of the boiler, and even cause the boiler to extinguish the fire. In order to ensure the efficient and safe operation of the boiler, the air powder online monitoring technology is usually used to realize the conditions for the air powder concentration. How...

Claims

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Application Information

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IPC IPC(8): F23N3/00
CPCF23N3/00F23N2900/05001F23N2223/44F23N2235/02F23N2237/16F23N2239/02
Inventor 苏胜王中辉向军胡松汪一徐俊任强强吴运凯江紫薇
Owner HUAZHONG UNIV OF SCI & TECH
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