A method for on-line soft measurement of coal-fired carbon oxidation factor of pow generation boiler

Abstract

A method for on-line soft measurement of coal-fired carbon oxidation factor of power generation boiler include such steps as selecting key variables, coal property parameter and boiler / unit property parameters as input vectors of soft measurement model, selecting them as input vectors, selecting them as input vectors, and selecting them as input vectors of soft measurement model. At the same time,the parameters of ash and fly ash after coal combustion are measured, and the carbon oxidation factor is calculated as the output vector of the soft sensor model. An on-line soft-sensing model of carbon oxidation factor was established, After establishing the soft-sensing model of coal-fired carbon oxidation factor of power generation boiler, if on-line measurement of coal-fired carbon oxidationfactor under a certain operating condition is required, only the measurement data of the following variables are assigned to the input vector X, and the calculated y is the carbon oxidation factor OFdifferent kinds of coal under different boiler loads. The invention modifies the carbon oxidation factor issued by the Intergovernmental Panel on Climate Change, so that the result is closer to the actual value. It can realize on-line measurement, real-time monitoring and boiler carbon combustion control of coal-fired boilers.

Description

technical field [0001] The invention relates to the field of environmental technology, in particular to an online soft measurement method for coal-burning carbon oxidation factor of a power generation boiler. technical background [0002] Global warming and greenhouse gas emissions have drawn increasing attention. At present, thermal power generation using coal as energy is still the main power generation method in my country, and coal combustion will emit a large amount of carbon dioxide gas. The formula for calculating greenhouse gas emissions is: [0003] CO 2 Emissions = AD x CC x OF x 44 / 12 (1) [0004] where AD is the fuel consumption in ton. CC fuel is a unit of carbon content, the unit is tonC / t. OF is the carbon oxidation factor, dimensionless. [0005] There are two methods for obtaining the carbon oxidation factor for coal combustion in a boiler. One is the actual measurement method. The enterprise measures the remaining carbon content data in the slag and ...

AI Technical Summary

Problems solved by technology

Compared with the actual measurement method, the parameter method is relatively simple, but the carbon oxidation factor is not only related to the nature of the coal type, but also related to the combustion equipment, unit load, etc. If the average carbon oxidation factor value of a certain coal type is used instead of the measured value of the device, it will inevitably produce There is a large error between the calculated greenhouse gas emissions and the actual emissions, which is not conducive to the control of carbon dioxide emissions by enterprises

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