Fly ash carbon content soft measurement method and coal-fired boiler combustion optimization method and system

A fly ash carbon content, coal-fired boiler technology, applied in design optimization/simulation, special data processing applications, etc., can solve problems such as strong hysteresis, inability to optimize boilers, and large errors, and achieve the effect of improving boiler combustion performance

Pending Publication Date: 2021-08-20
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Moreover, the prior art does not disclose how to use the carbon content of fly ash to guide the optimal combustion of the boiler. Other fly ash carbon content measurements are generally offline measurements. This type of method has a strong lag and large errors, not only high maintenance costs, but also cannot be timely Instruct field staff to optimize boiler combustion

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  • Fly ash carbon content soft measurement method and coal-fired boiler combustion optimization method and system
  • Fly ash carbon content soft measurement method and coal-fired boiler combustion optimization method and system
  • Fly ash carbon content soft measurement method and coal-fired boiler combustion optimization method and system

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Embodiment 1

[0049] refer to figure 1 , Propose embodiment 1 of the present application, embodiment 1 proposes a kind of fly ash carbon content soft measuring method, comprises the following steps:

[0050] Step 1. Collect the historical operating parameters of coal-fired boilers under multiple basic working conditions, and establish the correlation between the historical flue CO concentration and the historical fly ash carbon content under multiple basic working conditions;

[0051] Step 2. Determine the real-time working conditions and real-time operating parameters of the coal-fired boiler, and calculate the real-time fly ash carbon content corresponding to the real-time working conditions according to the real-time operating parameters and the association relationship established in the step 1.

[0052] The multiple basic working conditions of the coal-fired boiler in the step 1 correspond to a typical boiler load and a typical interval range of coal volatile matter, and the typical lo...

Embodiment 2

[0080] refer to image 3 , Embodiment 2 proposes a method for optimizing combustion of a coal-fired boiler, specifically comprising the following steps:

[0081] Step 1, adopt the fly ash carbon content soft measurement method as described in embodiment 1 to calculate the real-time fly ash carbon content in the coal-fired boiler;

[0082] Step 2. Compare the last two calculated real-time fly ash carbon contents, and adjust the total boiler air volume according to the changes of the last two real-time fly ash carbon contents.

[0083] In the step 2, specifically, when the carbon content of the latest real-time fly ash increases by 0.1%, the total air volume of the boiler is increased by 0.04%. Increase ΔQ3, if ΔQ1+ΔQ2>ΔQ3, keep the adjusted total air volume, if ΔQ1+ΔQ2≤ΔQ3, keep the total air volume before adjustment;

[0084] When the latest real-time fly ash carbon content decreases by 0.1%, reduce the total boiler air volume by 0.04%. After adjustment, calculate the q3 inc...

Embodiment 3

[0089] refer to Figure 4 , Embodiment 3 proposes a combustion optimization system for a coal-fired boiler based on the combustion optimization method for a coal-fired boiler in Embodiment 2, including:

[0090] The data acquisition module is used to collect historical operating parameters of coal-fired boilers under multiple basic working conditions, and collect real-time working conditions and real-time operating parameters of coal-fired boilers;

[0091] An association relationship establishment module, used to establish an association relationship between the historical flue CO concentration of coal-fired boilers and the historical fly ash carbon content under multiple basic working conditions;

[0092] The fly ash carbon content soft measurement module is used to calculate the real-time fly ash carbon content according to the real-time operating parameters of the coal-fired boiler and the correlation relationship established in the correlation relationship establishment mod...

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Abstract

The invention discloses a fly ash carbon content soft measurement method and a coal-fired boiler combustion optimization method and system. The fly ash carbon content soft measurement method comprises the following steps: 1, collecting historical operation parameters of a coal-fired boiler under multiple basic working conditions, and establishing an association relationship between the historical flue CO concentration and the historical fly ash carbon content under a plurality of basic working conditions; and 2, determining real-time working conditions and real-time operation parameters of the coal-fired boiler, and calculating the real-time fly ash carbon content under the corresponding real-time working conditions according to the real-time operation parameters and the association relationship established in the step 1. The boiler combustion optimization method is provided based on the fly ash carbon content of the coal-fired boiler, so that the total air volume of the boiler is adjusted according to the real-time fly ash carbon content of the coal-fired boiler, optimization of boiler combustion is finally achieved, and the combustion performance of the boiler is improved.

Description

technical field [0001] The invention relates to the technical field of combustion equipment, in particular to a soft measurement method for carbon content in fly ash and a combustion optimization method and system for a coal-fired boiler. Background technique [0002] In recent years, more and more attention has been paid to environmental issues and energy issues. The power generation industry is a large energy consumer in my country. How to improve the efficiency of power plant boilers as much as possible has become a hot issue that needs to be solved urgently. Improving boiler efficiency can not only improve power plants Economic benefits, and can improve energy efficiency and save resources. The carbon content of fly ash is one of the important parameters to measure the combustion efficiency of boilers. On-line monitoring of the carbon content of fly ash is helpful to guide the on-site operators to adjust the total boiler air volume in time to improve the economic efficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 苏胜舒淘任强强王中辉谢玉仙向军胡松汪一江龙徐俊
Owner HUAZHONG UNIV OF SCI & TECH
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