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Method for measuring carbon content of power station boiler fly ash based on hearth fly ash residence time

A technology of carbon content and residence time in fly ash, applied in design optimization/simulation, calculation, computer-aided design, etc., can solve problems such as carbon content in fly ash that have not been discovered, and achieve automatic control, low failure rate, The effect of high sensitivity

Active Publication Date: 2021-03-05
CHONGQING DATANG INTL SHIZHU POWER GENERATION CO LTD
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Problems solved by technology

At present, domestic coal-fired thermal power units have not found a soft measurement technology for the carbon content of fly ash that has been put into practice.

Method used

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  • Method for measuring carbon content of power station boiler fly ash based on hearth fly ash residence time

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Embodiment Construction

[0060] see figure 1 , a method for measuring the carbon content of power plant boiler fly ash based on the residence time of furnace fly ash, comprising the following steps: Step 1: decomposing the combustion factors affecting the carbon content of fly ash into hot air temperature factor, burnout factor, primary air Pressure factor and coal quality factor; step 2, according to the orthogonal rotation method, use the factor composition matrix after the maximum variance orthogonal rotation to obtain the influence weights of the four factors, and establish a factor analysis model for the carbon content of fly ash;

[0061] Step A: According to the orthogonal rotation method, the factor analysis model of the carbon content of the fly ash is obtained by using the factor component matrix after the maximum variance orthogonal rotation, specifically:

[0062] Carbon content of fly ash=-0.248F1+0.871F2+0.243F3-0.083F4...(1)

[0063] Among them: F1 is the hot air temperature factor, F2...

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Abstract

The invention discloses a method for measuring carbon content of a power station boiler fly ash based on hearth fly ash residence time. The method is characterized by comprising the steps that step 1,combustion factors influencing the fly ash carbon content are decomposed into a hot air temperature factor, a burnout factor, a primary air pressure factor and a coal quality factor; step 2, according to an orthogonal rotation method, influence weights of four factors are acquired by utilizing the factor component matrix after the maximum variance orthogonal rotation; a factor analysis model is created for the carbon content of the fly ash; compared with other modeling methods, the modeling method adopted by the invention is not limited by an algorithm, and is relatively high in practicability in a DCS system; the data is more comprehensive than other single algorithms; compared with hardware measurement, the parameter adaptability is higher; the invention has the characteristics of advancement, high sensitivity, good stability, high measurement accuracy and strong universality, and can be widely applied to the fields of electric power and the like.

Description

technical field [0001] The invention relates to a method for measuring the carbon content of fly ash, in particular to a method for measuring the carbon content of fly ash of a power station boiler based on the residence time of the fly ash in a furnace. Background technique [0002] The carbon content of fly ash is an important index reflecting the combustion conditions in the pulverized coal boiler furnace, and there are many influencing factors. Use the factor analysis method to diagnose the combustion process in the furnace, and find a few comprehensive indicators from many related influencing factors to reflect the main information contained in the original factors, so that it is convenient for the operator to find out the factors affecting the combustion process in a timely and accurate manner. Ash carbon content is the main factor to adjust combustion and improve boiler efficiency. [0003] For every 1% reduction in the carbon content of fly ash, the boiler efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/08
CPCG06F30/20G06F2119/08
Inventor 燕鸣李海永朱祥柯杜君
Owner CHONGQING DATANG INTL SHIZHU POWER GENERATION CO LTD
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