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Method for measuring boiler dry flue gas volume based on coal caloric values and exhaust fume oxygen amount

A technology of coal-fired calorific value and dry flue gas volume, applied in the field of soft measurement, can solve the problem that power plants do not have the analysis of coal-fired components and elements, and achieve the effects of avoiding harsh requirements, simplifying the calculation model, and meeting online calculations

Inactive Publication Date: 2015-12-16
SOUTHEAST UNIV
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Problems solved by technology

Since the power plant does not have the ability to analyze the elements of coal-fired components, the calculation method of the dry flue gas volume stipulated in the national standard cannot be used for the operation analysis of the power plant

Method used

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  • Method for measuring boiler dry flue gas volume based on coal caloric values and exhaust fume oxygen amount
  • Method for measuring boiler dry flue gas volume based on coal caloric values and exhaust fume oxygen amount
  • Method for measuring boiler dry flue gas volume based on coal caloric values and exhaust fume oxygen amount

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as figure 1 Shown is a method for measuring the amount of boiler dry flue gas based on the calorific value of coal combustion and the amount of exhaust gas oxygen. The calorific value of coal combustion, the excess air coefficient is calculated according to the exhaust gas oxygen amount, and the CO is calculated according to the coal calorific value 2 Theoretical maximum; based on stated excess air factor and CO 2 The theoretical maximum is calculated to get CO 2 content in dry flue gas, according to the CO 2 The content in the dry flue gas and the calorific value of coal combustion are calculated to obtain the volume and quality of the dry flue gas.

[0025] In the present invention, taking a 1000MW boiler as an example, the detailed steps for measuring the amount of dry flue gas are as follows:

[0026] Step 1: Obtain the exhaust gas oxygen amount O ...

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Abstract

The invention discloses a method for measuring boiler dry flue gas volume based on coal caloric values and exhaust fume oxygen amount. The exhaust fume oxygen amount can be acquired from the database of a power plant decentralized control system DCS, the coal caloric values are obtained from a power plant coal industrial analysis report, an excess air coefficient is obtained through the calculation based on the exhaust fume oxygen amount, and the CO2 theoretical maximum value is obtained through the calculation based on the coal caloric values. The content of CO2 in the dry flue gas is obtained through the calculation based on the excess air coefficient and the CO2 theoretical maximum value, and the volume and the mass of the dry flue gas are respectively obtained through the calculation based on the content of CO2 in the dry flue gas and the coal caloric values. The measuring method can effectively prevent the strict requirement that the coal component element analysis needs to be calculated based on national standard, simplifies the calculating model of the dry flue gas, and can meet the needs for the online calculation of the dry flue gas of a boiler.

Description

technical field [0001] The invention relates to a method for measuring the amount of dry flue gas of a boiler, belonging to the technical field of soft measurement. Background technique [0002] Boiler dry flue gas volume is an important parameter in the boiler combustion process, which is directly related to boiler economy and pollutant emission. At present, the boiler dry flue gas volume is usually calculated based on the standard model in GB10184-88, that is, the flue gas volume is determined by elemental analysis of the coal composition. [0003] However, the calculation method of dry flue gas volume stipulated in national standards is generally only used in boiler thermal efficiency tests or boiler performance assessment tests. Since the power plant does not have the ability to analyze the elements of coal-fired components, the calculation method of the dry flue gas volume stipulated by the national standard cannot be used for the operation analysis of the power plant....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCY02P90/84
Inventor 郝勇生韦思超周志成苏志刚王培红
Owner SOUTHEAST UNIV
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